Zhihai Zheng

Ru shi yu guo nei shi chang he

Ru shi yu guo nei shi chang he chan ye de he fa bao hu

2002

Ru shi yu nong chan pin shi ch

Ru shi yu nong chan pin shi chang kai fang

2000

WTO zhi shi jian ming du ben

2000

Shi jie mao yi zu zhi zhi shi du ben

1999