Which is the most authoritative, Huajian or Dada?

Compared with Dida, Huajian is the most authoritative.

1. According to relevant data, Shanghai Jiaotong University Health Examination Center is a professional medical institution established by Shanghai Jiaotong University Education Service Industry Investment Management (Group) Co., Ltd. in early 2008. Huajian fully relies on the rich medical resources of Shanghai Jiaotong University, Ruijin Hospital, Renji Hospital, Xinhua Hospital, Ninth People's Hospital, First People's Hospital, Sixth People's Hospital, Shanghai Children's Medical Center, Children's Hospital, Chest Hospital, Shanghai Mental Health Center and International Peace Maternal and Child Health Hospital, and adheres to the service principles of people-oriented, professional science, leading service and Excellence to serve corporate customers and individual customers.