Which is better, Ctrip or CITS?

they all have their own advantages, and they are all good.

specifically, Ctrip's self-operated tour groups may be more abundant in tourism products and services, including air tickets, hotels, train tickets, scenic spots tickets, etc., and the prices are relatively affordable. However, the tour groups of China National Travel Service may be more professional in terms of tourist routes and services. They usually offer a richer choice of tourist routes, including some unique tourist routes and more professional tour guide services.