Is the linkage advantage a regular company?

It's a regular company.

According to Baidu Encyclopedia, Linked Advantage Technology Co., Ltd. was founded in August 2003 by China Mobile and China UnionPay, focusing on providing innovative, green, safe and efficient financial and e-commerce products and services for enterprises and consumers. Linkage Advantage Technology Co., Ltd. is an industrial chain service provider of mobile finance and mobile e-commerce in China, which spans three major fields: comprehensive payment service, intelligent financial information service and mobile local multi-application service. To sum up, Linkage Advantage Technology Co., Ltd. is a formal company with strong strength.