Writing prompt: An Introduction to Hainan

Student essay:
Hainan is in the south of China.It is the second largest island in China and it's very beautiful.Hainan is famous for its blue sky,fresh air and sea.It's warm in winter that many tours set come here in winter.There are many scenery in it,such as Wuzhi mountain,Wanquan river and so on.And Hainan is surrounded by the sea.So the Hainan's seafood is very famous.The fruits in Hainan almost tropicana fruits,example coconuts,bananas,pineapples.They are all very delicious.
If you come to Hainan you'll feel people in Hainan are in a very friendly way.Hainan is very beautiful so it's a great place to travel.

Corrected essay:
Hainan is in the south of China. It is the second largest island in China and it's very beautiful. Hainan is famous for its blue sky, fresh air and sea. It's so warm in winter that many tourists come here in winter. There are many sceneries in it, such as Wuzhi Mountain, Wanquan River and so on. And Hainan is surrounded by the sea. So Hainan's seafood is very famous. The fruits in Hainan are mostly tropical fruits, for example, coconuts, bananas and pineapples. They are all very delicious.
If you come to Hainan, you'll feel that people in Hainan are very friendly. Hainan is very beautiful so it's a great place to travel.

Error analysis:
error_sentence: It's warm in winter that many tours set come here in winter.
correct_sentence: It's so warm in winter that many tourists come here in winter.
correction: so
error_type: Conjunction Error
error_severity: 3
error_description: Conjunction Error: According to English grammar rules, when 〈that〉 introduces an adverbial clause of result, it needs to be paired with the adverb of degree 『so』 to form the 'so...that...' structure, therefore 『so』 needs to be added before 〈warm〉 to make the sentence coherent.

error_sentence: It's warm in winter that many tours set come here in winter.
correct_sentence: It's so warm in winter that many tourists come here in winter.
error: tours set
correction: tourists
error_type: Noun Error
error_severity: 3
error_description: Noun Error: 〈tours set〉 is semantically unclear and does not fit the contextual logic; considering the context, the noun 『tourists』, which represents a group of visitors, should be used here, so 〈tours set〉 is changed to 『tourists』 to make the sentence's meaning clear.

error_sentence: There are many scenery in it,such as Wuzhi mountain,Wanquan river and so on.
correct_sentence: There are many sceneries in it, such as Wuzhi Mountain, Wanquan River and so on.
error: scenery
correction: sceneries
error_type: Noun Number Error
error_severity: 3
error_description: Noun Number Error: Multiple specific scenic spots are listed here, requiring the use of the plural form of the countable noun 『sceneries』 to represent different types of scenery, therefore 〈scenery〉 is changed to 『sceneries』 to make the sentence's meaning clear.

error_sentence: There are many scenery in it,such as Wuzhi mountain,Wanquan river and so on.
correct_sentence: There are many sceneries in it, such as Wuzhi Mountain, Wanquan River and so on.
error: mountain
correction: Mountain
error_type: Case Error
error_severity: 1
error_description: Case Error: According to English writing conventions, the first letter of proper nouns needs to be capitalized; 〈Wuzhi mountain〉 is a proper noun meaning “Wuzhi Mountain”, therefore 〈mountain〉 needs to be changed to 『Mountain』 to conform to the convention.

error_sentence: There are many scenery in it,such as Wuzhi mountain,Wanquan river and so on.
correct_sentence: There are many sceneries in it, such as Wuzhi Mountain, Wanquan River and so on.
error: river
correction: River
error_type: Case Error
error_severity: 1
error_description: Case Error: According to English writing conventions, the first letter of proper nouns needs to be capitalized; 〈Wanquan river〉 is a proper noun meaning “Wanquan River”, therefore 〈river〉 needs to be changed to 『River』 to conform to the convention.

error_sentence: So the Hainan's seafood is very famous.
correct_sentence: So Hainan's seafood is very famous.
error: the
error_type: Word Redundancy Error
error_severity: 2
error_description: Word Redundancy Error: 〈Hainan's〉 already includes the possessive determiner function, so an additional definite article is not needed; therefore, the redundant 『the』 is deleted to make the sentence more concise.

error_sentence: The fruits in Hainan almost tropicana fruits,example coconuts,bananas,pineapples.
correct_sentence: The fruits in Hainan are mostly tropical fruits, for example, coconuts, bananas and pineapples.
error: almost tropicana
correction: are mostly tropical
error_type: Sentence Structure Error
error_severity: 3
error_description: Sentence Structure Error: The original sentence's meaning is unclear; considering the context, it is intended to express that 'Hainan's fruits are mostly tropical fruits', therefore 〈almost tropicana〉 is changed to 『are mostly tropical』 to make the meaning coherent and conform to grammatical rules.

error_sentence: The fruits in Hainan almost tropicana fruits,example coconuts,bananas,pineapples.
correct_sentence: The fruits in Hainan are mostly tropical fruits, for example, coconuts, bananas and pineapples.
error: example
correction: for example,
error_type: Conjunction Error
error_severity: 3
error_description: ① Conjunction Error: When giving examples, the complete connecting phrase 『for example』 should be used to introduce specific examples, therefore 〈example〉 is changed to 『for example』 to conform to idiomatic expression; ② Punctuation Error: A comma is missing after 〈example〉 to separate sentence components, therefore a 『,』 is added after 〈example〉.

error_sentence: The fruits in Hainan almost tropicana fruits,example coconuts,bananas,pineapples.
correct_sentence: The fruits in Hainan are mostly tropical fruits, for example, coconuts, bananas and pineapples.
error: ,
correction: and
error_type: Conjunction Error
error_severity: 3
error_description: Conjunction Error: According to English grammar rules, when listing the last two items in a series, the conjunction 『and』 should be used instead of a comma, therefore 〈,〉 is changed to 『and』 to standardize the sentence structure.

error_sentence: If you come to Hainan you'll feel people in Hainan are in a very friendly way.
correct_sentence: If you come to Hainan, you'll feel that people in Hainan are very friendly.
correction: ,
error_type: Punctuation Error
error_severity: 2
error_description: Punctuation Error: After the conditional adverbial clause 〈If you come to Hainan〉, a comma is needed to separate the main clause from the subordinate clause, therefore a 『,』 is added after 〈Hainan〉 to conform to writing conventions.

error_sentence: If you come to Hainan you'll feel people in Hainan are in a very friendly way.
correct_sentence: If you come to Hainan, you'll feel that people in Hainan are very friendly.
correction: that
error_type: Conjunction Error
error_severity: 3
error_description: Conjunction Error: When the verb 〈feel〉 is followed by an object clause, the conjunction 〈that〉 is needed to introduce the clause, therefore 〈that〉 is added after 『feel』 to ensure the sentence structure is complete.

error_sentence: If you come to Hainan you'll feel people in Hainan are in a very friendly way.
correct_sentence: If you come to Hainan, you'll feel that people in Hainan are very friendly.
error: in a
error_type: Word Redundancy Error
error_severity: 3
error_description: Word Redundancy Error: The adjective phrase 〈very friendly〉 can directly serve as a predicative; the 〈in a...way〉 structure is redundant, therefore 〈in a〉 is deleted to make the meaning more concise and clear.

error_sentence: If you come to Hainan you'll feel people in Hainan are in a very friendly way.
correct_sentence: If you come to Hainan, you'll feel that people in Hainan are very friendly.
error: way
error_type: Word Redundancy Error
error_severity: 3
error_description: Word Redundancy Error: The adjective phrase 〈very friendly〉 can directly serve as a predicative; the 〈in a...way〉 structure is redundant, therefore 〈way〉 is deleted to make the meaning more concise and clear.