检查这篇英语作文有何语法拼写错误 急
Yuan long ping is a great scientist.He was born in September 7th 1930 in Beijing .he studied in Southwest Agricultural College when he was young.He worked very hard.When he was at school.In 1973,He has developed a new kind of rice.Then he becomes a famous scientist.Because of the new kind of rice,many countries grow more rice than before.In my opinion He is a hero of china!