# Analysis of Children’s Sports Evaluation Based on Big Data

Authors: Yue Yin; Kaizhen Wang
Journal: Mobile Information Systems
 (2022)

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## Abstract

The physical health level of children in our country is relatively low and becoming worse with each passing day. In this context, the quality of children’s physical education has been given a higher degree of attention, and the arrival of the era of big data has provided a better development opportunity for children’s physical education, which has broken the traditional thinking of physical education. Further, it can significantly improve the education level of children’s physical education. Therefore, this study examines the importance of evaluating children’s sports performance and provides a plan for developing a system based on physical fitness using the concept of big data. The findings of this study suggest that the conduction of such a research study is of great importance and gives novel ideas for improving children’s physical activity environments. Using the concept of big data technology, the degree of physical fitness among children has dramatically improved. Further, it is envisaged that this research would bring out the optimal and evaluation direction of children’s physical activities in the current era.


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## Body

## 1. Introduction

Toddlers refer to children aged 3–6, which is also the period of early childhood education. In kindergartens, as the space for this group to study and live, physical activity is one of the main educational methods, which has a positive effect and influence on the health and fitness of young children [1, 2]. However, from the actual situation, the evaluation link is always a weak point in the development of physical activities in the early childhood stage, and it is difficult to draw scientific results, resulting in insufficient flexibility in children’s physical activities [3]. Further, the evaluation system of children’s physical activity is indispensable and has significant value. Taking this as the core of research will have positive significance for children’s education [4]. The advent of the era of big data has injected fresh blood into the innovation of children’s sports concepts. With the progress in the field of information technology, the innovation of teachers' teaching concepts, the development of big data technology, and the construction of children's physical education teaching evaluation system have become a recent trend. The formation of such systems provides an excellent development opportunity for the construction and innovation of the evaluation system of children’s physical education [5].Large-scale data that cannot be stored, handled, or analyzed using typical database software are referred to as big data [6]. Big data differentiates itself from traditional data in terms of volume, pace, and diversity. The amount of data generated from different sources is growing at an exponential rate, resulting in the concept of big data [7]. Because of the recent surge in unstructured data, big data has become an essential aspect of research. For instance, consumer perception, decision, emotion, and personal desire to act are all revealed in new research based on big data analysis [8]. Big data, on the other hand, requires a dependable system capable of performing enormous data computations, as well as a rigorous data policy for consumption and storage [9]. The concept and techniques of big data are very important because it allows the extraction of new insights or values that would be impossible to derive from small amounts of data, which can then be used to initiate significant changes in a variety of fields, including market, corporate, civic, and governmental relationships [10].The evaluation of children’s physical education is a key part of children’s physical education. Constructing an evaluation system for children’s physical education from the perspective of big data faces both development opportunities and challenges. Keeping the importance and challenges of big data in mind, this study examines and discusses certain solutions for children’s physical education and evaluation under big data analysis. Based on the evaluation results, the individual development status of children is discussed and analyzed in the teaching organization to determine the optimal solution, which makes the design of sports activities more targeted and effective.The remaining paper is structured as follows. Section2 is about the application framework of big data in children’s sports. The construction of an evaluation system for children’s physical activities is presented in Section 3. This section further explains different measurement indicators of children’s physical activities, the subject of evaluation, and diversified evaluation methods and establishes a scientific teaching organization system. Section 4 discusses the significance and suggestions of kindergarten physical education activity evaluation. Section 5 finally concludes the overall theme of the paper.


## 2. The Application Framework of Big Data in Children’s Sports

The ultimate goal of physical education is to let educated people have a healthy body, acquire corresponding sports skills, and form a behavioral habit to achieve lifelong sports [11]. When “big data” acts on physical education, it is necessary to reform and optimize physical education and sports skills learning through the procedures of data collection, data screening, data analysis, and data presentation. The completeness and accuracy of data collection determine the effect of big data application, including basic information, learning information, behavioral information, social information, and sports skill information of education stakeholders, that is, the internal and external environment in which sports learning is located. According to the real-time data and prediction judgment of “big data” technology, it is possible to adjust and optimize the selection of sports items, curriculum arrangement, teaching methods, teaching evaluation, etc. We should develop towards a more scientific, intuitive, and personalized education. The application of “big data” in physical education is to establish a learning model through the recording of the physical learning process and trajectory, to establish a learning model through learning analysis, and to make judgments on the students’ physical education learning effects and sports behavior trends. Figure 1 elaborates the application frame of big data in children’s sports at an abstract level. Figure 2 depicts the process followed during big data analytics for the sports education of children. The specific details of each step are given in Table 1.Figure 1
Big data framework for physical education.Figure 2
Big data analytics process.Table 1
Big data application framework.
Data collectionData filteringData analysisData presentationBasic information: students’ physiology, psychology, family; basic information of teachers’ teaching, school physical education system.According to the purpose of the presentation, determine the screening planLearning analytics, behavior analysis, and skill level analysisCurriculum construction is scientific teaching management informationLearning information: students’ learning attitude. Degree of cognition. The degree of completion of learning objectives, learning time, learning methods and means, teachers’ teaching methods, methods, course arrangements, course progress, etc.Behavioral information: sports activity time, sports events, sports consumption, content and methods of receiving sports information, sports interests, etc.Sports skill information: physical skill characteristics, sports skill level, study time, participation status, etc.


## 3. Construction of an Evaluation System for Children’s Physical Activities

The construction and optimization of the evaluation system for children’s physical activities has a significant impact on the healthy growth of kids. From the perspective of physical fitness, the fundamental purpose is to cultivate people with all-around development. From this perspective, optimize the measurement indicators, evaluation methods, and organizational system of children’s physical activities to ensure the improvement of children’s physical fitness level.


### 3.1. Measurement Indicators of Children’s Physical Activity

During the early stages of childhood, physical education has a direct and effective impact on the health and learning of children. However, it should be noted that the establishment of physical activity measurement indicators should be based on the core content of healthy physical fitness, focusing on the measurement of body composition, muscle, muscular endurance, cardiorespiratory endurance, and flexibility. Under the measurement target, the pertinence of sports activities is stronger, and the evaluation indicators are more clear. Finally, the systematic analysis of the whole process of indicators is completed by means of quantitative methods. After data tracking, experiments, and statistical analysis, a complete measurement indicator system is formed. The selection and determination of indicators is the core component of the construction of the evaluation system. With health and physical fitness as the core, the evaluation effect shown is more ideal and comprehensive, as shown in Figure3.Figure 3
Kindergarten physical activity quality evaluation index.
(a)(b)


### 3.2. Determining the Subject of Evaluation and Diversified Evaluation Methods

Physical activities in early infancy are varied, but they do not place enough emphasis on the end evaluation, which leads to positive school culture. In fact, children’s understanding and perception of physical activities are not strong, which also shows the effect of the evaluation system to a certain extent. Taking healthy physical fitness as the core, determining and screening out the evaluation indicators of children’s physical activities and positioning the focus of attention here will surely produce a chemical reaction. However, it should also be noted that the validity of the evaluation results is directly related to the evaluation method. To this end, the evaluation system of children’s sports activities needs to be optimized, and the evaluation methods should be updated accordingly. For example, the traditional outcome assessment has been transformed into a procedural assessment based on children’s performance, participation and cognition. With the flexible application of mutual evaluation and self-evaluation, finally, a scientific evaluation result can be obtained. It is used to judge the current degree of children’s physical fitness and promote their healthy growth [12, 13].


### 3.3. Establishing a Scientific Teaching Organization System

The evaluation of physical education in the early childhood stage, because it does not have the ability for self-development, largely depends on the support of the kindergarten teaching organization. From the perspective of health and fitness, to establish a sports activity evaluation system, the leading role of teachers should not be underestimated. To this end, teachers should have a full understanding and cognition of health and fitness, clearly know the core content of health and fitness, and after establishing measurement indicators and frameworks, carry out physical activities, and be able to understand the process of evaluation. Based on the evaluation results, the individual development status of children is discussed and analyzed in the teaching organization to determine the optimal solution, which makes the design of sports activities more targeted and effective [14, 15]. The establishment of the teaching organization system should be led by schools and based on teachers so that children can develop physically and mentally, as shown in Figure 4.Figure 4
Teacher’s teaching system.


## 3.1. Measurement Indicators of Children’s Physical Activity

During the early stages of childhood, physical education has a direct and effective impact on the health and learning of children. However, it should be noted that the establishment of physical activity measurement indicators should be based on the core content of healthy physical fitness, focusing on the measurement of body composition, muscle, muscular endurance, cardiorespiratory endurance, and flexibility. Under the measurement target, the pertinence of sports activities is stronger, and the evaluation indicators are more clear. Finally, the systematic analysis of the whole process of indicators is completed by means of quantitative methods. After data tracking, experiments, and statistical analysis, a complete measurement indicator system is formed. The selection and determination of indicators is the core component of the construction of the evaluation system. With health and physical fitness as the core, the evaluation effect shown is more ideal and comprehensive, as shown in Figure3.Figure 3
Kindergarten physical activity quality evaluation index.
(a)(b)


## 3.2. Determining the Subject of Evaluation and Diversified Evaluation Methods

Physical activities in early infancy are varied, but they do not place enough emphasis on the end evaluation, which leads to positive school culture. In fact, children’s understanding and perception of physical activities are not strong, which also shows the effect of the evaluation system to a certain extent. Taking healthy physical fitness as the core, determining and screening out the evaluation indicators of children’s physical activities and positioning the focus of attention here will surely produce a chemical reaction. However, it should also be noted that the validity of the evaluation results is directly related to the evaluation method. To this end, the evaluation system of children’s sports activities needs to be optimized, and the evaluation methods should be updated accordingly. For example, the traditional outcome assessment has been transformed into a procedural assessment based on children’s performance, participation and cognition. With the flexible application of mutual evaluation and self-evaluation, finally, a scientific evaluation result can be obtained. It is used to judge the current degree of children’s physical fitness and promote their healthy growth [12, 13].


## 3.3. Establishing a Scientific Teaching Organization System

The evaluation of physical education in the early childhood stage, because it does not have the ability for self-development, largely depends on the support of the kindergarten teaching organization. From the perspective of health and fitness, to establish a sports activity evaluation system, the leading role of teachers should not be underestimated. To this end, teachers should have a full understanding and cognition of health and fitness, clearly know the core content of health and fitness, and after establishing measurement indicators and frameworks, carry out physical activities, and be able to understand the process of evaluation. Based on the evaluation results, the individual development status of children is discussed and analyzed in the teaching organization to determine the optimal solution, which makes the design of sports activities more targeted and effective [14, 15]. The establishment of the teaching organization system should be led by schools and based on teachers so that children can develop physically and mentally, as shown in Figure 4.Figure 4
Teacher’s teaching system.


## 4. Significance and Suggestions of Kindergarten Physical Education Activity Evaluation

### 4.1. Significance of Evaluation

In kindergarten physical education activities, teachers should be committed to allowing children to gain direct successful experience, acquire alternative experiences, and give appropriate evaluation and feedback to children so that children can experience the joy of sports, so as to improve their self-efficacy. Its meaning is as follows:(1)
Making the curriculum better for children’s development, altering the state of random gamification or making children too passive and single learning abilities, mixing physical and mental exercise, and making the curriculum better for children’s development Serve.(2)
Teachers and children can find and solve problems in time, so as to promote the continuous development and improvement of physical education activities in kindergartens.(3)
Children become the main body of sports activities, so evaluation promotes the formation of children’s subject consciousness, strengthens the cultivation of divergent thinking ability [16], and makes them develop good habits of independent exploration and independent exercise.(4)
Diversity of evaluation. As children’s development goals, various content structures, values, and perspectives are different, and different conclusions will be drawn on the teaching process or children’s behavior. Children’s creative awareness and innovative content should be included in the evaluation system. Only by fully affirming them can children’s creativity and innovation ability be improved.


### 4.2. Development Suggestions

#### 4.2.1. Classroom Physical Activity

Implementing scheduled, classroom-based physical activity breaks is an emerging technique for promoting the everyday involvement of children in physical activity in schools. Physical exercise in the classroom encompasses any activity conducted in the classroom during normal class time, regardless of intensity. It incorporates physical activity both during academic classroom instruction and during breaks planned expressly for physical activity. It also takes into account time spent studying specialized subjects (such as art or music) that are not taught by the regular classroom teacher. Classroom teachers must also consider student safety while dealing with space. The classroom (e.g., desks and tables) should be set up such that pupils (children) have enough free area to walk around during physical activity. Figures5(a)–5(c) show the different layouts of the classroom to accommodate physical activity for children inside the classroom [17].Figure 5
(a) Classroom arrangement for physical activity. (b) Classroom arrangement for physical activity. (c) Classroom arrangement for physical activity.
(a)(b)(c)


#### 4.2.2. Improving the Professional Quality of Early Childhood Physical Education Teachers

Kindergartens should build a sound retraining system for teachers in physical education and speed up the construction of early childhood physical education teachers to organize and guide preschool teachers to engage in research on preschool sports. In order to avoid the loss of experienced teachers, the state and local governments should formulate relevant policies and treatment suitable for “their own” according to their actual conditions and try to retain talents to ensure the stability of preschool teachers. Private kindergartens can provide preschool teachers with assistance in life and other aspects, especially economic subsidies, according to their teaching age and work performance, and strive to retain teachers to the greatest extent possible. Government departments should regularly carry out training on physical education for preschool teachers, and teachers from colleges and universities may be invited to train preschool teachers on theoretical knowledge and professional skills in physical education. Set up learning about children’s sports in the kindergarten teacher major and regard it as a part of the graduation assessment of the kindergarten teacher major, or open some courses related to children’s sports in the physical education major of colleges and universities, and so on. Measures to cultivate and expand the reserve force of early childhood physical education teachers should be taken.


#### 4.2.3. Improving the Infrastructure of Sports Activities

Kindergartens should raise funds through various channels and forms to speed up the construction of site equipment and facilities. In the use of funds, set up special funds for the purchase of sports equipment and the construction of sports venues. In addition, kindergartens should try their best to meet the requirements of children’s sports facilities and sports equipment. For example, teachers can guide children in the creation of sports equipment to satisfy the demands of children’s sports activities or hold a competition of preschool teachers’ sports equipment to achieve this goal. Encourage preschool instructors to construct their own sports equipment, which not only saves money for the kindergarten but also increases the hands-on skill and inventiveness of the children. Relevant departments such as kindergartens and education bureaus should join forces to build indoor activity places for young children. Table2 shows various sports and physical activities that best suit school-age children. In order to obtain a good result in terms of good health, development, and well-being, these activities should be performed at least one hour a day.Table 2
Best suited physical activities and sports for school-age children.
Physical activities for small childrenActivity or sports typesPurpose or advantagesPhysical activity for school-agedchildren on a daily basisRunningSuch type of unstructured, ordinary physical activitiesmight be less expensive and simpler to incorporate into abusy family’s schedule than organized sports and activities.ChasingPlayground gamesWalking to schoolRiding on bicycleSports for school-age childrenCricket blastIt improves students’ mobility and coordination ability and helps them learn and follow basic directions and strategiesBasketball programNetSetGoRugby gameAuskickNetball


#### 4.2.4. Parents Should Be Aware of the Role of Physical Activity on Children’s Growth

Kindergartens can also regularly provide training on sports for parents to improve their awareness of sports. Teachers and parents should establish good parent-teacher communication behaviors and provide effective information exchange for the healthy growth of children. Because it may cause misunderstanding that children cannot participate in sports activities due to accidents. Form the dual influence of kindergarten and parents to cultivate children’s sports interest, develop children’s sports ability, and let children eventually form the habit of lifelong physical exercise.


## 4.1. Significance of Evaluation

In kindergarten physical education activities, teachers should be committed to allowing children to gain direct successful experience, acquire alternative experiences, and give appropriate evaluation and feedback to children so that children can experience the joy of sports, so as to improve their self-efficacy. Its meaning is as follows:(1)
Making the curriculum better for children’s development, altering the state of random gamification or making children too passive and single learning abilities, mixing physical and mental exercise, and making the curriculum better for children’s development Serve.(2)
Teachers and children can find and solve problems in time, so as to promote the continuous development and improvement of physical education activities in kindergartens.(3)
Children become the main body of sports activities, so evaluation promotes the formation of children’s subject consciousness, strengthens the cultivation of divergent thinking ability [16], and makes them develop good habits of independent exploration and independent exercise.(4)
Diversity of evaluation. As children’s development goals, various content structures, values, and perspectives are different, and different conclusions will be drawn on the teaching process or children’s behavior. Children’s creative awareness and innovative content should be included in the evaluation system. Only by fully affirming them can children’s creativity and innovation ability be improved.


## 4.2. Development Suggestions

### 4.2.1. Classroom Physical Activity

Implementing scheduled, classroom-based physical activity breaks is an emerging technique for promoting the everyday involvement of children in physical activity in schools. Physical exercise in the classroom encompasses any activity conducted in the classroom during normal class time, regardless of intensity. It incorporates physical activity both during academic classroom instruction and during breaks planned expressly for physical activity. It also takes into account time spent studying specialized subjects (such as art or music) that are not taught by the regular classroom teacher. Classroom teachers must also consider student safety while dealing with space. The classroom (e.g., desks and tables) should be set up such that pupils (children) have enough free area to walk around during physical activity. Figures5(a)–5(c) show the different layouts of the classroom to accommodate physical activity for children inside the classroom [17].Figure 5
(a) Classroom arrangement for physical activity. (b) Classroom arrangement for physical activity. (c) Classroom arrangement for physical activity.
(a)(b)(c)


### 4.2.2. Improving the Professional Quality of Early Childhood Physical Education Teachers

Kindergartens should build a sound retraining system for teachers in physical education and speed up the construction of early childhood physical education teachers to organize and guide preschool teachers to engage in research on preschool sports. In order to avoid the loss of experienced teachers, the state and local governments should formulate relevant policies and treatment suitable for “their own” according to their actual conditions and try to retain talents to ensure the stability of preschool teachers. Private kindergartens can provide preschool teachers with assistance in life and other aspects, especially economic subsidies, according to their teaching age and work performance, and strive to retain teachers to the greatest extent possible. Government departments should regularly carry out training on physical education for preschool teachers, and teachers from colleges and universities may be invited to train preschool teachers on theoretical knowledge and professional skills in physical education. Set up learning about children’s sports in the kindergarten teacher major and regard it as a part of the graduation assessment of the kindergarten teacher major, or open some courses related to children’s sports in the physical education major of colleges and universities, and so on. Measures to cultivate and expand the reserve force of early childhood physical education teachers should be taken.


### 4.2.3. Improving the Infrastructure of Sports Activities

Kindergartens should raise funds through various channels and forms to speed up the construction of site equipment and facilities. In the use of funds, set up special funds for the purchase of sports equipment and the construction of sports venues. In addition, kindergartens should try their best to meet the requirements of children’s sports facilities and sports equipment. For example, teachers can guide children in the creation of sports equipment to satisfy the demands of children’s sports activities or hold a competition of preschool teachers’ sports equipment to achieve this goal. Encourage preschool instructors to construct their own sports equipment, which not only saves money for the kindergarten but also increases the hands-on skill and inventiveness of the children. Relevant departments such as kindergartens and education bureaus should join forces to build indoor activity places for young children. Table2 shows various sports and physical activities that best suit school-age children. In order to obtain a good result in terms of good health, development, and well-being, these activities should be performed at least one hour a day.Table 2
Best suited physical activities and sports for school-age children.
Physical activities for small childrenActivity or sports typesPurpose or advantagesPhysical activity for school-agedchildren on a daily basisRunningSuch type of unstructured, ordinary physical activitiesmight be less expensive and simpler to incorporate into abusy family’s schedule than organized sports and activities.ChasingPlayground gamesWalking to schoolRiding on bicycleSports for school-age childrenCricket blastIt improves students’ mobility and coordination ability and helps them learn and follow basic directions and strategiesBasketball programNetSetGoRugby gameAuskickNetball


### 4.2.4. Parents Should Be Aware of the Role of Physical Activity on Children’s Growth

Kindergartens can also regularly provide training on sports for parents to improve their awareness of sports. Teachers and parents should establish good parent-teacher communication behaviors and provide effective information exchange for the healthy growth of children. Because it may cause misunderstanding that children cannot participate in sports activities due to accidents. Form the dual influence of kindergarten and parents to cultivate children’s sports interest, develop children’s sports ability, and let children eventually form the habit of lifelong physical exercise.


## 4.2.1. Classroom Physical Activity

Implementing scheduled, classroom-based physical activity breaks is an emerging technique for promoting the everyday involvement of children in physical activity in schools. Physical exercise in the classroom encompasses any activity conducted in the classroom during normal class time, regardless of intensity. It incorporates physical activity both during academic classroom instruction and during breaks planned expressly for physical activity. It also takes into account time spent studying specialized subjects (such as art or music) that are not taught by the regular classroom teacher. Classroom teachers must also consider student safety while dealing with space. The classroom (e.g., desks and tables) should be set up such that pupils (children) have enough free area to walk around during physical activity. Figures5(a)–5(c) show the different layouts of the classroom to accommodate physical activity for children inside the classroom [17].Figure 5
(a) Classroom arrangement for physical activity. (b) Classroom arrangement for physical activity. (c) Classroom arrangement for physical activity.
(a)(b)(c)


## 4.2.2. Improving the Professional Quality of Early Childhood Physical Education Teachers

Kindergartens should build a sound retraining system for teachers in physical education and speed up the construction of early childhood physical education teachers to organize and guide preschool teachers to engage in research on preschool sports. In order to avoid the loss of experienced teachers, the state and local governments should formulate relevant policies and treatment suitable for “their own” according to their actual conditions and try to retain talents to ensure the stability of preschool teachers. Private kindergartens can provide preschool teachers with assistance in life and other aspects, especially economic subsidies, according to their teaching age and work performance, and strive to retain teachers to the greatest extent possible. Government departments should regularly carry out training on physical education for preschool teachers, and teachers from colleges and universities may be invited to train preschool teachers on theoretical knowledge and professional skills in physical education. Set up learning about children’s sports in the kindergarten teacher major and regard it as a part of the graduation assessment of the kindergarten teacher major, or open some courses related to children’s sports in the physical education major of colleges and universities, and so on. Measures to cultivate and expand the reserve force of early childhood physical education teachers should be taken.


## 4.2.3. Improving the Infrastructure of Sports Activities

Kindergartens should raise funds through various channels and forms to speed up the construction of site equipment and facilities. In the use of funds, set up special funds for the purchase of sports equipment and the construction of sports venues. In addition, kindergartens should try their best to meet the requirements of children’s sports facilities and sports equipment. For example, teachers can guide children in the creation of sports equipment to satisfy the demands of children’s sports activities or hold a competition of preschool teachers’ sports equipment to achieve this goal. Encourage preschool instructors to construct their own sports equipment, which not only saves money for the kindergarten but also increases the hands-on skill and inventiveness of the children. Relevant departments such as kindergartens and education bureaus should join forces to build indoor activity places for young children. Table2 shows various sports and physical activities that best suit school-age children. In order to obtain a good result in terms of good health, development, and well-being, these activities should be performed at least one hour a day.Table 2
Best suited physical activities and sports for school-age children.
Physical activities for small childrenActivity or sports typesPurpose or advantagesPhysical activity for school-agedchildren on a daily basisRunningSuch type of unstructured, ordinary physical activitiesmight be less expensive and simpler to incorporate into abusy family’s schedule than organized sports and activities.ChasingPlayground gamesWalking to schoolRiding on bicycleSports for school-age childrenCricket blastIt improves students’ mobility and coordination ability and helps them learn and follow basic directions and strategiesBasketball programNetSetGoRugby gameAuskickNetball


## 4.2.4. Parents Should Be Aware of the Role of Physical Activity on Children’s Growth

Kindergartens can also regularly provide training on sports for parents to improve their awareness of sports. Teachers and parents should establish good parent-teacher communication behaviors and provide effective information exchange for the healthy growth of children. Because it may cause misunderstanding that children cannot participate in sports activities due to accidents. Form the dual influence of kindergarten and parents to cultivate children’s sports interest, develop children’s sports ability, and let children eventually form the habit of lifelong physical exercise.


## 5. Conclusion

Nowadays, due to the development of technology and the increase in the volume of data, the construction of the evaluation system for children’s physical education is facing new development and unprecedented challenges. Big data technology can play a significant part in sorting out this issue. The application of big data promotes the digitization and scientific innovation of the evaluation system, the diversification of children’s physical education evaluation content, and the intelligence of teaching evaluation techniques. This study analyzes the value of children’s sports evaluation and proposes a strategy for building an assessment system based on healthy physical fitness. The outcomes of the proposed system illustrate that this research study is of great significance and provides new ideas for the improvement of children’s physical activity environment. Using big data technology in children’s physical health and fitness level, the accuracy of the model has increased significantly. It is anticipated that through this research study, the optimization and evaluation direction of children’s physical activities in the new era will be pointed out in a well-organized and effective way.



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*Source: 2476650-2022-06-17.xml*