evidence from Jiangsu and Shandong province evidence from Jiangsu Province evidence from Zhejiang province evidence from Sichuan Province evidence from Jiangxi Province evidence from rural Guangdong China 农民专业合作社内信用合作达成与治理研究：以苏鲁地区为例：evidence from Jiangsu and Shandong province evidence from language policy evidence from colleges in Jiangsu province, China evidence from Yan'an and rural area