### Chinese: 从2003年起，青海省实施封湖育鱼，禁止任何单位、集体和个人到青海湖及湖区主要河流及支流捕捞裸鲤，禁止销售裸鲤及其制品。
### English: Since 2003, Qinghai Province has implemented the closure of lakes for fish breeding, prohibited any unit, collective or individual from fishing for naked carp on Qinghai Lake and the main rivers and tributaries of the lake area, and prohibited the sale of naked carp and its products.
### Errors: There is a major error of incorrect translation includes information not present in the correct translation at "naked carp and Qinghai Lake". There is a minor error of incorrect translation has stylistic problems at "has implemented".

### Improved English: From 2003, Qinghai province implemented the closure of lakes for fish breeding, prohibited any unit, collective or individual from fishing gymnocypris przewalskii in the main rivers and tributaries in the lake area, and prohibited the sale of gymnocypris przewalskii and their products.