What is the difference between Wenzhou railway investment and happiness track?

Companies have different status. Wenzhou Railway Investment Co., Ltd. is a subsidiary of Happiness Track, and the status of Happiness Track is higher than that of Wenzhou Railway Investment Co., Ltd., and they are different. Wenzhou, referred to as "Ou" for short, is a prefecture-level city under the jurisdiction of Zhejiang Province, a second-class big city, an important trade city in the southeast coast and a regional central city approved by the State Council.