Writing prompt: Written Expression. Assume you are Lin Chen and have just made a new pen pal named Ted. Please write a letter to him describing your personal background, family situation, and your plan to visit Beijing over the summer. Writing hints: Tian'anmen Square, the Palace Museum, Beijing Roast Duck.
Dear Ted,
________
Welcome to China. Have a good day!
Yours,
Lin Chen

Student essay:
I am Lin Chen. I am an Chinese people. This summer holiday, I am goning to go to Beijing with my family. I have a big family. My father is handsome, he is a pilot. My mother is very beautiful, she is a nurse. I have a sister, she is a high school student. I am gonging to Tian'anmen Square, it is very big. The Palace Museum is very beautiful. Do you know the Beijing Roast Duck? It is very nice!

Corrected essay:
I am Lin Chen. I am a Chinese. This summer holiday, I am going to go to Beijing with my family. I have a big family. My father is handsome, and he is a pilot. My mother is very beautiful, and she is a nurse. I have a sister, and she is a high school student. I am going to Tian'anmen Square and it is very big. The Palace Museum is very beautiful. Do you know the Beijing Roast Duck? It is very nice!

Error analysis:
error_sentence: I am an Chinese people.
correct_sentence: I am a Chinese.
error: an Chinese people
correction: a Chinese
error_type: Word Redundancy Error
error_severity: 4
error_description: ① Determiner Error: 〈Chinese〉 starts with a consonant sound, so 〈an〉 is changed to 『a』 to conform to grammatical rules.; ② Word Redundancy Error: According to English grammar rules, 〈Chinese〉 itself can be used as a noun for nationality; 〈people〉 is plural, while the sentence requires the singular noun 〈Chinese〉 to describe personal identity, so 〈people〉 is deleted to meet grammatical requirements.

error_sentence: This summer holiday, I am goning to go to Beijing with my family.
correct_sentence: This summer holiday, I am going to go to Beijing with my family.
error: goning
correction: going
error_type: Spelling Error
error_severity: 1
error_description: Spelling Error: From the sentence's meaning, it is clear that the intention is to express "planning or intending to do something," so 〈goning〉 is a misspelling of 『going』; 〈goning〉 needs to be changed to 『going』 to make the sentence coherent.

error_sentence: My father is handsome, he is a pilot.
correct_sentence: My father is handsome, and he is a pilot.
correction: and
error_type: Conjunction Error
error_severity: 3
error_description: Conjunction Error: 〈My father is handsome〉 and 〈he is a pilot〉 contain independent subject-verb structures and can be independent clauses, so the conjunction 『and』 needs to be added before 〈he〉.

error_sentence: My mother is very beautiful, she is a nurse.
correct_sentence: My mother is very beautiful, and she is a nurse.
correction: and
error_type: Conjunction Error
error_severity: 3
error_description: Conjunction Error: 〈My mother is very beautiful〉 and 〈she is a nurse〉 contain independent subject-verb structures and can be independent clauses, so the conjunction 『and』 needs to be added before 〈she〉.

error_sentence: I have a sister, she is a high school student.
correct_sentence: I have a sister, and she is a high school student.
correction: and
error_type: Conjunction Error
error_severity: 3
error_description: Conjunction Error: 〈I have a sister〉 and 〈she is a high school student〉 contain independent subject-verb structures and can be independent clauses, so the conjunction 『and』 needs to be added before 〈she〉.

error_sentence: I am gonging to Tian'anmen Square, it is very big.
correct_sentence: I am going to Tian'anmen Square and it is very big.
error: gonging
correction: going
error_type: Spelling Error
error_severity: 1
error_description: Spelling Error: From the sentence's meaning, it is clear that the intention is to express "planning or intending to do something," so 〈gonging〉 is a misspelling of 『going』; 〈gonging〉 needs to be changed to 『going』 to make the sentence coherent.

error_sentence: I am gonging to Tian'anmen Square, it is very big.
correct_sentence: I am going to Tian'anmen Square and it is very big.
error: ,
correction: and
error_type: Conjunction Error
error_severity: 3
error_description: Conjunction Error: 〈I am gonging to Tian'anmen Square〉 and 〈it is very big〉 contain independent subject-verb structures and can be independent clauses, so 〈,〉 needs to be deleted and the conjunction 『and』 added before 〈it〉.