What is the relationship between bus manufacturers such as Dajinlong, Suzhou Jinlong and Jinlv?

Dajinlong is Xiamen Jinlong (Xiamen Jinlong United Automobile Co., Ltd.), Xiaojinlong is Xiamen Jinlv (Xiamen Jinlong Wagon Co., Ltd.) and Suzhou Jinlong. The three dragons are relatively independent and essentially related. Among them, Dajinlong and Xiaojinlong belong to the same group and are brothers. Suzhou Jinlong is a subsidiary of Dajinlong Holdings.