2001年7月中旬上海长征蔬菜种子公司青菜种子已批量出口美国加利福尼亚州，从而使上海青菜种子走向国际市场。青菜原产中国，栽培历史悠久，上海地区育菜栽培面积大，品种丰富。为了使上海青菜种子走向国际市场，该公司2000年5月份派员，参加了赴美国农业考察团，10多天的考察 In mid-July 2001, Shanghai Changzheng Vegetable Seeds Co., Ltd. has exported large quantities of vegetable seeds to California, the United States, thereby bringing the seeds of Shanghai vegetables to the international market. Chinese vegetables originating in China, cultivation has a long history, Shanghai cultivation of vegetables growing area, rich variety. In order to make the seeds of Shanghai Greenpeace go to the international market, the company dispatched personnel in May 2000 to participate in the delegation to the United States Agricultural Expedition for more than 10 days