Writing prompt: My Summer Holiday

Student essay:
Summer holiday is the longest holiday in a year.I climbed many mountains during the summer.One of the best experience was climbing the Great Wall.The Great Wall was bulit many years ago.Our ancestors built it to defended the enemies.Many young people died because of building it.we often say that the man who didn't climbed the mountain isn't a hero.So it is very tiring for me to climb the Great Wall.The day was very hot when I arrived at there.I was so tired that I felt I couldn't take a breath when I climbed it.But I persisted in it.Finally,I reached the top of mountain.I was glad that the sightseeing in the mountain is so beautiful.I saw the trees,flowers,birds and so on.There are even a river on the mountain.I took many photos.I learned that we should try our best to do everything.Nothing is impossible.We all can do it.

Corrected essay:
Summer holiday is the longest holiday in a year. I climbed many mountains during the summer. One of the best experiences was climbing the Great Wall. The Great Wall was built many years ago. Our ancestors built it to defend the enemies. Many young people died because of building it. We often say that the man who doesn't climb the mountain isn't a hero. So it was very tiring for me to climb the Great Wall. The day was very hot when I arrived there. I was so tired that I felt I couldn't take a breath when I climbed it. But I persisted in it. Finally, I reached the top of the mountain. I was glad that the sightseeing on the mountain was so beautiful. I saw the trees, flowers, birds and so on. There was even a river on the mountain. I took many photos. I learned that we should try our best to do everything. Nothing is impossible. We all can do it.

Error analysis:
error_sentence: One of the best experience was climbing the Great Wall.
correct_sentence: One of the best experiences was climbing the Great Wall.
error: experience
correction: experiences
error_type: Noun Number Error
error_severity: 3
error_description: Noun Number Error: "one of" is followed by a plural noun meaning "one of them", so 〈experience〉 is changed to 『experiences』 to conform to grammatical rules.
error_sentence: The Great Wall was bulit many years ago.
correct_sentence: The Great Wall was built many years ago.
error: bulit
correction: built
error_type: Spelling Error
error_severity: 2
error_description: Spelling Error: According to the sentence meaning, it intends to express "build", so 〈bulit〉 is a misspelling of 『built』, and needs to be changed to 『built』 to make the sentence coherent.
error_sentence: Our ancestors built it to defended the enemies.
correct_sentence: Our ancestors built it to defend the enemies.
error: defended
correction: defend
error_type: Nonfinite Verb Form Error
error_severity: 3
error_description: Nonfinite Verb Form Error: Here, 〈to〉 is followed by the base form of the verb to express purpose, so 〈defended〉 is changed to 『defend』 to conform to grammatical rules.
error_sentence: Many young people died because of building it.we often say that the man who didn't climbed the mountain isn't a hero.
correct_sentence: Many young people died because of building it. We often say that the man who doesn't climb the mountain isn't a hero.
error: it.we
correction: it. We
error_type: Space Error
error_severity: 2
error_description: ① Space Error: There is a missing space between 〈.〉 and the following word, so a space is added after 〈.〉 to conform to writing conventions; ② Case Error: According to English writing conventions, the first letter of a word at the beginning of a sentence needs to be capitalized, so 〈we〉 needs to be changed to 『We』 to conform to conventions.
error_sentence: Many young people died because of building it.we often say that the man who didn't climbed the mountain isn't a hero.
correct_sentence: We often say that the man who doesn't climb the mountain isn't a hero.
error: didn't climbed
correction: doesn't climb
error_type: Verb Tense Error
error_severity: 4
error_description: ① Verb Tense Error: Proverbs are expressed in the simple present tense, so the past tense 〈didn't〉 is changed to 『doesn't』 to conform to grammatical rules; ② Nonfinite Verb Form Error: The auxiliary verb 『doesn't』 should be followed by the base form of the verb, so 〈climbed〉 is changed to 『climb』 to conform to grammatical rules.
error_sentence: So it is very tiring for me to climb the Great Wall.
correct_sentence: So it was very tiring for me to climb the Great Wall.
error: is
correction: was
error_type: Verb Tense Error
error_severity: 3
error_description: Verb Tense Error: This describes a past event and requires the past tense, so the present tense 〈is〉 is changed to 『was』 to match the context's tense.
error_sentence: The day was very hot when I arrived at there.
correct_sentence: The day was very hot when I arrived there.
error: at
error_type: Word Redundancy Error
error_severity: 2
error_description: Word Redundancy Error: 〈arrive〉 is an intransitive verb, and when followed by the adverb of place 〈there〉, no preposition is needed; 〈at〉 is a redundant preposition, so 〈at〉 is deleted to conform to grammatical rules.
error_sentence: Finally,I reached the top of mountain.
correct_sentence: Finally, I reached the top of the mountain.
correction: the
error_type: Determiner Error
error_severity: 2
error_description: Determiner Error: Considering the context, 〈mountain〉 here is a specific object, requiring the definite article 『the』 to clearly refer to the mountain where the Great Wall mentioned earlier is located, so 『the』 is added before 〈mountain〉.
error_sentence: I was glad that the sightseeing in the mountain is so beautiful.
correct_sentence: I was glad that the sightseeing on the mountain was so beautiful.
error: in
correction: on
error_type: Preposition Error
error_severity: 2
error_description: Preposition Error: According to English grammatical rules, 〈on〉 should be used to indicate a position on a surface, so 〈in〉 is changed to 『on』.
error_sentence: I was glad that the sightseeing in the mountain is so beautiful.
correct_sentence: I was glad that the sightseeing on the mountain was so beautiful.
error: is
correction: was
error_type: Verb Tense Error
error_severity: 3
error_description: Verb Tense Error: This describes a past event and requires the past tense, so the present tense 〈is〉 is changed to 『was』 to match the context's tense.
error_sentence: There are even a river on the mountain.
correct_sentence: There was even a river on the mountain.
error: are
correction: was
error_type: Subject-Verb Agreement Error
error_severity: 3
error_description: Subject-Verb Agreement Error: The subject 〈a river〉 is singular, so the verb must be singular, and the tense is past, thus 〈are〉 is changed to 『was』 to conform to grammatical rules.