Give me an introduction over 200 words for PROTEX INTERNATIONAL LIMITED Great Vision International Inc.（Niran Biochemical Limited）, a chemical company in 123 Renmin (M) Road, Unit 2809, Wuxi, Jiangsu, China Wuxi,Jiangsu,China Write exactly 10 paragraphs each separated with two new lines answering this question. The last paragraph must start with "sources".
user