I want to find a better travel agency in Shanghai to sign up for a group tour, but I just don't know which one is good.

The key depends on where you go to play. Every travel agency has a better route. You should probably choose the right direction first, and then find a travel agency, but it must be a self-organized group of that travel agency, not a combination of several travel agencies! And after you choose these, it depends on the accommodation arrangement of that line.

Anyway, you get what you pay for.

And the best definition of self-organizing is that all the travel agencies you want to go to are the same, and you can rest assured of the relative quality, because most of them are in the form of cooperation now, and some are in the form of selling groups!