# Transportation Deployment Casebook/2024/Guangzhou Metro
## 1 Introduction

Guangzhou City, commonly known as Guangzhou, abbreviated as Guang, Sui, and Yangcheng, is the provincial capital and sub-provincial city of Guangdong Province, the People's Republic of China, and one of the first batch of coastal open cities. Guangzhou Metro is the urban rail transit system of Guangzhou City, Guangdong Province, China. The operation scope of Guangzhou Metro covers Guangzhou City and Foshan City. As of January 2024, Guangzhou Metro has 16 operation lines and 8 under construction. Currently, 653km of Guangzhou’s local subway network is under construction, with a length of approximately 171.5km.

## 2 Quantitative Analysis

8.7.2024 Date source= To analyze the development history of the Guangzhou subway and the role of the subway in the urban development process of Guangzhou, the average annual number of subway passengers in Guangzhou from 1997 to 2023, the subway mileage from 1997 to 2023 and the permanent population of Guangzhou from 1997 to 2023 were selected Growth data. The following Table 1 is the population of Guangzhou, Table 2 is the mileage of the subway in Guangzhou, and Table 3 is the annual number of passengers on the Guangzhou subway.
Table 1 Guangzhou population,1997 to 2022(in millions)
| Year | population | Year | population |
| 1997 | 6.6293 | 2010 | 12.7096 |
| 1998 | 6.7047 | 2011 | 13.4632 |
| 1999 | 6.8076 | 2012 | 14.1553 |
| 2000 | 9.948 | 2013 | 14.7224 |
| 2001 | 9.9675 | 2014 | 15.2902 |
| 2002 | 9.8476 | 2015 | 15.9495 |
| 2003 | 9.7293 | 2016 | 16.7838 |
| 2004 | 9.6606 | 2017 | 17.4627 |
| 2005 | 9.4968 | 2018 | 17.9044 |
| 2006 | 9.9666 | 2019 | 18.3059 |
| 2007 | 10.5301 | 2020 | 18.6766 |
| 2008 | 11.1534 | 2021 | 18.8106 |
| 2009 | 11.8697 | 2022 | 18.7341 |
Table 2 Guangzhou Metro mileage ,1997 to 2023(in kms)
| Year | Metro mileage | Year | Metro mileage |
| 1997 | 5.4 | 2011 | 236 |
| 1998 | 5.4 | 2012 | 236 |
| 1999 | 18.5 | 2013 | 260 |
| 2000 | 18.5 | 2014 | 266 |
| 2001 | 18.5 | 2015 | 266 |
| 2002 | 24.7 | 2016 | 308.7 |
| 2003 | 36.8 | 2017 | 390.6 |
| 2004 | 36.8 | 2018 | 478 |
| 2005 | 54.7 | 2019 | 515 |
| 2006 | 108.2 | 2020 | 515 |
| 2007 | 113.2 | 2021 | 607.6 |
| 2008 | 118.2 | 2022 | 643.1 |
| 2009 | 147 | 2023 | 652.81 |
| 2010 | 236 | | |
Table 3 Guangzhou Annual Transit Ridership ,1997 to 2023(in millions)
| Year | Annual Riders | Year | Annual Riders |
| 1997 | 7.2 | 2011 | 1644.982 |
| 1998 | 36.5 | 2012 | 1853.2145 |
| 1999 | 33.5 | 2013 | 2053.9645 |
| 2000 | 64.423 | 2014 | 2277.892 |
| 2001 | 63.656 | 2015 | 2406.9195 |
| 2002 | 66.101 | 2016 | 2561.3145 |
| 2003 | 122.165 | 2017 | 2802.543 |
| 2004 | 163.994 | 2018 | 3025.9595 |
| 2005 | 213.525 | 2019 | 3305.878 |
| 2006 | 280.685 | 2020 | 2405.934 |
| 2007 | 473.003 | 2021 | 2834.0425 |
| 2008 | 599.001 | 2022 | 2358 |
| 2009 | 674.9945 | 2023 | 3130 |
| 2010 | 1177.782 | | |
Afterthat use the data to estimate a three-parameter logistic function:
S(t) = K/[1+exp(-b(t-to))]
Where:
S(t)is the priedicted data
K is the carrying capacity of the system (in our case, the maximum number of rides&the maxmum number of population )
T is time(years)
T$_0$ is the year in which 1/2 K is achieved
The S(t) formula can be formed to:
LN( Ridership/(K - Ridership))=bt+c or LN( Metro mileage/(K - Metro mileage))=bt+c
The K value in the above formula is a measure of saturation. Since the Guangzhou Metro has not reached saturation, the least squares method is used to find the value of K. The following two tables show the K value of Guangzhou Annual Transit Ridership and the K value of Guangzhou population respectively.
Table 4 Determine the value of K(Annual Ridership)
| K | 3500 | 3400 | 3600 | 37000 | 3800 | 3666 | 3680 | 3670 | 3660 | 3665 |
| INTERCEPT ( c ) | --583.72166564 | --606.3184288 | --567.69558728 | --555.0497784 | --544.58058609 | --559.0622599 | --557.37804564 | --558.57630201 | --559.79851955 | --559.1843555 |
| b | 0.28987325366 | 0.30116262591 | 0.28186199007 | 0.27553739287 | 0.27029905322 | 0.27754448936 | 0.27670206035 | 0.27730142302 | 0.27791274321 | 0.27760555842 |
| RSQ | 0.92003091063 | 0.91123563499 | 0.92218888595 | 0.92239324789 | 0.92181910192 | 0.92244572058 | 0.92243600635 | 0.92244479139 | 0.92244418256 | 0.92244571207 |
| t_i=c/-b | 2013.713436 | 2013.2592049 | 2014.0906091 | 2014.4263275 | 2014.7336056 | 2014.3158352 | 2014.3617468 | 2014.329014 | 2014.2959732 | 2014.3125328 |
Table 5 Determine the value of K(Population)
| K | 20 | 21 | 27 | 28 | 29 | 27.5 |
| INTERCEPT ( c ) | --275.59589499 | --239.56009623 | --164.50808655 | --158.95070584 | --154.17391707 | --161.61987879 |
| b | 0.13753191429 | 0.11949833073 | 0.081819023562 | 0.079016546914 | 0.076605257987 | 0.08036291408 |
| RSQ | 0.92956246625 | 0.94624101691 | 0.96110828442 | 0.96113060962 | 0.96102356906 | 0.96113943623 |
| t_i=c/-b | 0.072570021411 | 0.087660676093 | 0.16412567045 | 0.17615524167 | 0.18809926186 | 0.17015233649 |

### 2.2 Analysis

The life cycle phases are shown in Figure 1, Figure 2, and Figure 3. It can be seen from Figure 1 that the current passenger travel volume of Guangzhou Metro is close to the mature stage. The first half of the existing data is in good agreement with the S-curve. However, there was a significant decline in passenger travel between 2019 and 2020. This is due to the impact of covid-19. During this period, a series of policies limited the number of subway trips and the development of Guangzhou's subway.
Figure 2 shows the distance of Guangzhou subway operation mileage. There are two stages in the figure where the mileage increased rapidly. One is around 2010, when Guangzhou hosted the Asian Games, so policies were supportive at this time. The second is between 2016 and 2019. During this stage, the annual average mileage of Guangzhou Metro The number of trips is also increasing dramatically. Basically, the average annual number of trips is positively correlated with the total operating mileage of the subway.
At the same time, there is always a plateau period 1 to 2 years before and after each rapid increase in mileage. This is a characteristic of the subway mode of transportation. A subway requires a certain amount of time to plan and construct, as well as a lot of investment. This is also the reason why subways are not suitable for small and medium-sized cities.
Figure 3 shows the population growth curve of Guangzhou. The first half is basically consistent with the S-curve, but in the second half the population growth may be slowly slowed down by factors such as social, economic, cultural, and city size. Therefore, the second half of the curve may not conform to the change pattern of S-curve.

##### Regression Results

Table 6 Regression Results for Ridership
| Regression Statistics | |
| K | 3666 |
| INTERCEPT | --559.0622599 |
| R Square | 0.92244572058 |
| b | 0.27754448936 |
| tought | 2014.3158352 |
Table 7 Regression Results for Population
| Regression Statistics | |
| K | 27.5 |
| INTERCEPT | --161.61987879 |
| R Square | 0.96113943623 |
| b | 0.08036291408 |
| tought | 2011.1251644 |

## 3 Qualitative Analysis
### 3.1 Mode description

In 1863, the first subway opened in London, England.Before the advent of the subway, the main way people traveled was by horse-drawn carriage. Compared with carriages, buses and other travel modes, the advantages of the subway are: 1. The subway has a large transportation capacity compared to other modes of transportation. 2. The subway has a high punctuality rate. 3. Traveling by the subway takes less time. 4. The space required by the subway is mainly Underground space reduces the use of above ground space.
As the urban population continues to increase, subways have increasingly become a major indicator of whether a city can become an international metropolis. The sensational effect generated by the subway, the increase in popularity along the line, and the adsorption effect on people's livelihood facilities such as residential buildings, commercial outlets, star-rated hotels, cultural, educational and health facilities, urban complexes, etc. are difficult to match by any public transportation means.
While it has the above advantages, the subway also has many shortcomings: large investment, long construction period, and high operation and maintenance costs. The biggest flaw is the large loss area and high amount of losses. Especially in some cities with a small total passenger flow or characterized by tidal passenger flow, the subway will not only fail to create the economic benefits it deserves, but will also make local debts tighter.

#### 3.1.1 Broad service coverage area

Guangzhou Metro is currently one of the most extensive and attractive subway systems in the world. Guangzhou Metro is currently the third largest urban rail transit system in mainland China and the third largest urban rail transit system in the world. As of December 28, 2023, Guangzhou Metro currently has 271 operating stations covering 12 administrative districts in Guangzhou and Chancheng District, Nanhai District, and Shunde District in Foshan City. The following is the specific information of each line of Guangzhou Metro.
| Line | Terminals | Terminals | Commencement | Newest | Length | Stations | Depots/ |
| Line | (District) | (District) | Commencement | Extension | km | Stations | Stabling Sidings |
| 1 | Xilang | Guangzhou East Railway Station | 1997 | 1999 | 18.5 | 16 | Xilang |
| 1 | (Liwan) | (Tianhe) | 1997 | 1999 | 18.5 | 16 | Xilang |
| 2 | Guangzhou South Railway Station | Jiahewanggang | 2002 | 2010 | 31.8 | 24 | Jiahe/Dazhou |
| 2 | (Panyu) | (Baiyun) | 2002 | 2010 | 31.8 | 24 | Jiahe/Dazhou |
| 3 | Panyu Square | Airport North (Terminal 2) (Huadu) | 2005 | 2018 | 68.5 | 30 | Jiahe/Xiajiao |
| 3 | (Panyu) | Tianhe Coach Terminal (Tianhe) | 2005 | 2018 | 68.5 | 30 | Jiahe/Xiajiao |
| 4 | Nansha Passenger Port | Huangcun | 2005 | 2017 | 60 | 23 | Xinzao |
| 4 | (Nansha) | (Tianhe) | 2005 | 2017 | 60 | 23 | Xinzao |
| 5 | Jiaokou | Huangpu New Port | 2009 | 2023 | 41.7 | 30 | Yuzhu/Shuanggang |
| 5 | (Liwan) | (Huangpu) | 2009 | 2023 | 41.7 | 30 | Yuzhu/Shuanggang |
| 6 | Xunfenggang | Xiangxue | 2013 | 2016 | 41.7 | 31 | Xunfenggang/Luogang |
| 6 | (Baiyun) | (Huangpu) | 2013 | 2016 | 41.7 | 31 | Xunfenggang/Luogang |
| 7 | Meidi Dadao | Yanshan | 2016 | 2023 | 54.24 | 27 | Dazhou/Yifeng/Jitang |
| 7 | (Shunde, Foshan) | (Huangpu) | 2016 | 2023 | 54.24 | 27 | Dazhou/Yifeng/Jitang |
| 8 | Jiaoxin | Wanshengwei | 2003 | 2020 | 33.9 | 28 | Baiyunhu |
| 8 | (Baiyun) | (Haizhu) | 2003 | 2020 | 33.9 | 28 | Baiyunhu |
| 9 | Fei'eling | Gaozeng | 2017 | — | 20.1 | 11 | Qishan |
| 9 | (Huadu) | (Baiyun) | 2017 | — | 20.1 | 11 | Qishan |
| 13 | Yuzhu | Xinsha | 2017 | — | 28.3 | 11 | Yuzhu/Guanhu |
| 13 | (Huangpu) | (Zengcheng) | 2017 | — | 28.3 | 11 | Yuzhu/Guanhu |
| 14 | Jiahewanggang (Baiyun) | Dongfeng (Conghua) | 2017 | 2018 | 75.4 | 22 | Shihu/Zhenlong/Dengcun |
| 14 | Xinhe (Baiyun) | Zhenlong (Huangpu) | 2017 | 2018 | 75.4 | 22 | Shihu/Zhenlong/Dengcun |
| 18 | Xiancun | Wanqingsha | 2021 | — | 58.3 | 8 | Longzhen/Wanqingsha |
| 18 | (Tianhe) | (Nansha) | 2021 | — | 58.3 | 8 | Longzhen/Wanqingsha |
| 21 | Yuancun | Zengcheng Square | 2018 | 2019 | 61.5 | 21 | Zhenlong/Xiangling |
| 21 | (Tianhe) | (Zengcheng) | 2018 | 2019 | 61.5 | 21 | Zhenlong/Xiangling |
| 22 | Chentougang | Panyu Square | 2022 | — | 18.2 | 4 | Longzhen/Chentougang |
| 22 | (Panyu) | (Panyu) | 2022 | — | 18.2 | 4 | Longzhen/Chentougang |
| APM | Canton Tower | Linhexi | 2010 | — | 4 | 9 | Chigang Pagoda |
| APM | (Haizhu) | (Tianhe) | 2010 | — | 4 | 9 | Chigang Pagoda |
| Guangfo | Xincheng Dong | Lijiao | 2010 | 2018 | 39.6 | 25 | Xianan |
| Guangfo | (Shunde, Foshan) | (Haizhu) | 2010 | 2018 | 39.6 | 25 | Xianan |

#### 3.1.2 Comfortable ride experience

In order to give passengers a better riding experience, Guangzhou Metro has added many humanized measures.
1. Female carriages: Guangzhou Metro will pilot female carriages on Line 1 starting from June 28, 2017. During the period of 07:30 to 09:30 and 17:00 to 19:00 on weekdays (excluding holidays), the last carriage of Guangzhou Metro Line 1 towards Guangzhou East Station and the first carriage towards Xilong Set as women's compartment.
2. Mother and baby room: At the end of 2016, Guangdong Metro built the first mother and baby room on a pilot basis at Guangdong South Station. Starting from 2017, maternal and child rooms will be set up at newly opened line stations. Since 2018, Guangzhou Metro has also overcome difficulties such as limited station space, insufficient water, electricity, ventilation, and passenger flow lines on existing lines, and added independent maternal and child rooms at stations that meet the conditions for renovation on existing lines.
As of May 2022, a total of 145 maternal and infant rooms have been built on the Guangzhou Metro line network, serving more than 1,000 maternal and infant passengers on average every day, including Guangzhou South Railway Station, Nansha Passenger Transport Port Station, Huadu Square Station, Airport North Station, and Conghua Passenger Transport Station A total of 6 stations including Zengcheng Square Station and Zengcheng Square Station were awarded Guangzhou Maternity and Infant Room Demonstration Sites.

#### 3.1.3 Diverse ticketing methods

Guangzhou Metro supports a variety of ticket purchasing methods, including one-way tickets, day tickets, bus codes, credit cards, Apple pay, and facial recognition. There are a total of 8 ticket purchasing methods. Among them, the facial recognition entry function used in the east extension of Guangzhou Metro Line 5 and the second phase of Line 7 in December 2023 will also be a new direction for the future development of ticketing in various subway systems.

### 3.2 Technology
#### 3.2.1 Evolution mechanism and prevention and control mechanism of major risks in urban rail transit operations

Guangzhou Metro has achieved technological breakthroughs in five aspects: First, it has overcome the panoramic scanning monitoring and early warning technology for fires in high-speed trains running in long distances, and achieved accurate monitoring and early warning of fires in running trains; second, it has broken through the vehicle-ground collaborative detection of objects beyond visual range intrusion limits. and risk analysis technology to achieve vehicle-ground coordinated over-the-horizon dynamic and accurate identification; the third is to overcome intelligent flood prediction and early warning and dynamic prevention and control decision-making technology to achieve rapid spatial-temporal early warning and prevention of the full flow path in sudden flooding tunnels; the fourth is to break through Induced network passenger flow risk prevention and control technology for passengers-train-line network-information collaboration realizes the reconstruction of network passenger flow induction paths; fifthly, establishes "scenario-response" digital emergency response auxiliary decision-making technology to support joint prevention of major operational risks Joint control.

#### 3.2.2 signal system

In terms of signaling system, Guangzhou Metro Lines 1, 2, and 8 adopt the Siemens FTGS train operation control system, and other lines adopt the CBTC train operation control system. Among them, the CBTC train operation control system used by Guangzhou Metro Line 7 is fully Chinese. The development and application of the MTC-I type CBTC train operation control system with independent intellectual property rights has broken the monopoly of foreign manufacturers on China's urban rail transit signaling systems for more than ten years.

### 3.3 The role of policy in birthing phase
#### 3.3.1 The role of policies in overall development

In the early stages of Guangzhou's subway construction, it received support from many policies. In 1984, the Guangzhou Metro Preparatory Office drew on the experience of the Hong Kong Metro and proposed for the first time in the country the idea of "focusing on transportation, taking into account civil defense" and building subway lines on major transportation corridors, and received approval from relevant departments. This change in design thinking has brought Guangzhou subway construction into the fast lane. Subsequently, Guangzhou began to compile subway network planning and engineering plans. Through policy support, the initial planning of the Guangzhou Metro is to develop along the line based on the TOD model. This played a guiding role in development in the early stage.
The policy guidance of the "Recent Line Network Planning and Implementation Adjustment Plan in 2000" issued in 1997 proposed to give priority to the construction of Lines 3 and 4 that have been modified to go deep into the south to support urban development.On December 29, 2002, the first section of Line 2 was opened for trial operation. Since then, the "Ten" track network of Guangzhou Metro has been initially formed. At present, the construction of the basic framework of Guangzhou Metro in all directions has been initially completed.On this basis, due to the overall urban expansion of Guangzhou and the bid to host the 2010 Asian Games, the development of Guangzhou Metro has entered its peak period.
In August 2005, the National Development and Reform Commission officially approved the "Guangzhou Urban Rapid Rail Transit Recent Construction Plan" and agreed to build multiple lines between 2005 and 2010 with a total length of 127.6 kilometers.
In February 2009, the National Development and Reform Commission approved the "Guangzhou City Recent Construction Plan Adjustment" (2005-2012), agreeing to make appropriate adjustments to the construction tasks and goals of the July 2005 "Guangzhou City Rapid Rail Transit Recent Construction Plan".
In July 2012, the National Development and Reform Commission approved Guangzhou’s recent urban rail transit construction plan (2012-2018). Only the northern extension of Line 8 and Line 11 are urban lines, and the rest are suburban radial lines.
In order to meet the development needs of Guangfo City, in 2015, the National Development and Reform Commission approved the construction of the first phase adjustment section of Line 7. This line connects the two cities of Guangzhou and Foshan, further deepening the connection between the two cities.
On July 30, 2020, the "Guangdong-Hong Kong-Macao Greater Bay Area Intercity Railway Construction Plan" was approved by the National Development and Reform Commission. At this point, policy development will be more inclined to support the lines linking Guangzhou City and the Greater Bay Area, including the southern extension of the original Line 18 (Nansha to Zhongshan (Zhuhai) intercity, 79km), the northern extension of Line 18 (from Guangzhou east to Huadu-Tiangui intercity, 38km), the northern extension of Line 22 (intercity from Fangcun to Baiyun Airport, 39km) and the original Line 28 (intercity from Foshan via Guangzhou to Dongguan, 107km).

#### 3.3.2 Changes in charging policy

According to Guangzhou’s public transportation fare discount adjustment plan, starting from September 1, 2023, the preferential policies for Guangzhou subways and buses will change. The following are the new preferential plans:
Ordinary passengers who spend more than 80 yuan but less than 200 yuan on the Guangzhou subway and buses in a calendar month will enjoy a 20% discount.
If it exceeds 200 yuan, you will enjoy a 50% discount.
This means more discounts for multiple rides, not only for the subway, but also for buses and water buses.

### 3.4 Market development

Due to the nature of subway operations, Guangzhou Metro does not have any commercial competitors. Therefore, the development of the market is mainly related to the growth of population. The larger the population base in Guangzhou, the higher the proportion of people choosing to travel by subway, and the broader the Guangzhou subway market will be. Through the S-curve, we can see that the current resident population in Guangzhou is still in the rising stage, so the market development of Guangzhou Metro will also be more advantageous in the future.

## 4 Reference

* ↑ "Introduction to Guangdong Province – Traveling in China". 知乎专栏 (in Chinese). Retrieved 2024-03-03.
* ↑ "Guangzhou Metro". www.zhihu.com. Retrieved 2024-03-03.
* ↑ "The west extension section of Guangzhou Metro Line 7 will be officially opened at 14:00 on May 1__Xinkuai.com". www.xkb.com.cn. Retrieved 2024-03-03.
* ↑ "The east extension of Line 5 and the second phase of Line 7 will be opened at 12 noon on December 28 - Guangzhou Municipal People's Government Portal". www.gz.gov.cn. Retrieved 2024-07-08.
* ↑ "Guangzhou's Seventh National Census Bulletin[1] (No. 6) - Urban and rural population and floating population - Guangzhou Municipal People's Government Portal". www.gz.gov.cn. Retrieved 2024-03-03.
* ↑ 又消耗我6枚硬币. "【广州地铁】1997-2023年线路发展动态展示（真实比例）_哔哩哔哩_bilibili". www.bilibili.com (in Simplified Chinese). Retrieved 2024-03-03.
* ↑ "Ministry of Transport: Urban rail transit passenger volume will drop 18.2% year-on-year in 2022". Bing. Retrieved 2024-03-03.
* ↑ "With 11.569 million passengers, Guangzhou Metro set a new single-day passenger flow record". Bing. Retrieved 2024-03-03.
* ↑ "2016 Annual Report. Guangzhou Metro". Bing. Retrieved 2024-03-03.
* ↑ "[Yesterday's review] On January 12, the total passenger flow of the line network was 9.968 million. Guangzhou Metro". Bing. Retrieved 2024-03-03.
* ↑ "London Underground | History, Routes & Facts | Britannica". www.britannica.com. 2024-03-01. Retrieved 2024-03-03.
* ↑ "Analysis of the advantages and disadvantages of urban subways and buses". 知乎专栏 (in Chinese). Retrieved 2024-03-03.
* ↑ "Analysis of the advantages and disadvantages of urban subways and buses". 知乎专栏 (in Chinese). Retrieved 2024-03-03.
* ↑ "Guangzhou has been approved for ten more sections of subway lines, with the mileage to be opened in 2023 to be approximately 2.5 times the current number - Guangzhou Municipal People's Government Portal". www.gz.gov.cn. Retrieved 2024-03-03.
* ↑ "Guangzhou Metro Line 1 will pilot female carriages starting today_NetEase News". news.163.com. Retrieved 2024-03-03.
* ↑ "Guangzhou Daily Digital Report-145 maternal and child rooms in Guangzhou Metro serve thousands of people on average every day". gzdaily.dayoo.com. Retrieved 2024-03-03.
* ↑ "The east extension of Line 5 and the second phase of Line 7 will be opened at 12 noon on December 28 - Guangzhou Municipal People's Government Portal". www.gz.gov.cn. Retrieved 2024-03-03.
* ↑ "To study the prevention and control of major risks in urban rail operations, a national key research and development plan project led by Guangzhou Metro was launched_Technology". www.sohu.com. Retrieved 2024-03-03.
* ↑ "Guangzhou Metro". www.zhihu.com. Retrieved 2024-03-03.
* ↑ "Review of the history of Guangzhou Metro". news.sina.com.cn. Retrieved 2024-03-03.
* ↑ "New century, new opportunities, new planning - how was Guangzhou Metro Line 3 born? _Tencent News". new.qq.com. Retrieved 2024-03-03.
* ↑ "Past Events: Guangzhou Underground Tenglong realizes its subway dream in 39 years_News Center_Sina.com". news.sina.com.cn. Retrieved 2024-03-03.
* ↑ "Start and foundation laying—Review of the first phase of Guangzhou Metro planning (2005-2010)_Tencent News". new.qq.com. Retrieved 2024-03-03.
* ↑ "Three subway lines in Guangzhou are allowed to be built ahead of schedule, and one is added in Luogang, Panyu and Huadu". news.ifeng.com (in Chinese). Retrieved 2024-03-03.
* ↑ "[Guangzhou's recent urban rail transit construction plan approved]-National Development and Reform Commission". www.ndrc.gov.cn. Retrieved 2024-03-03.
* ↑ 羊城派 (2022-04-30). "deal! The west extension section of Guangzhou Metro Line 7 will be officially opened at 14:00 on May 1". news.sina.com.cn. Retrieved 2024-03-03.
* ↑ "[Reply on the third phase of Guangzhou's urban rail transit construction plan (2017-2023) (Development and Reform Foundation [2017] No. 498)] - National Development and Reform Commission". www.ndrc.gov.cn. Retrieved 2024-03-03.
* ↑ "Guangzhou bus and subway discounts will be adjusted from September: 20% off for purchases over 80 yuan and 50% off for purchases over 200 yuan - Guangzhou Municipal People's Government Portal". www.gz.gov.cn. Retrieved 2024-03-03.