What is the relationship between Tianwei Yingli and China Yingli? Which one is official?

Tianwei Yingli was originally named Tianwei Baobian. At first, it was a subsidiary of Tianwei Baobian, mainly developing new energy. Later, it was separated from the company through several years of development. At present, it is the largest new energy enterprise of solar energy utilization and related products in China. See Tianwei Yingli official website /main /main/user/index.asp for details.