Jiuzhaigou is best not to join a group if you can drive by car. I just came back from Jiuzhai with a group on May Day.
There are several places where the tour group will be pitted:
1. Walking into a Tibetan restaurant to roast whole sheep (it's a pit, and 2/ person is really boring, so the host told him not to go before he had enough to eat, so he advised his friends not to go)
2. Tibetan singing and dancing party (this can be seen, and 2/ person can only say that it is unsatisfactory)
3. And Rhodiola 9 yuan/box costs about 4 yuan) Don't buy it, because people have oxygen bottles in Huanglong Scenic Area.
4. Walking into a polygamous family (this is a shopping mall, so the price of buying silverware is still 18.8/g, and some people still buy fakes, and the purity is not as high as that of Zhuo Ma's 999)
5. Local products (the medicinal materials in this store are ridiculously high, and Maca is 48 yuan /kg in Baidu Encyclopedia, and this shopping mall sells 68 yuan/kg; Fortunately, I just bought a little, otherwise I would regret it. The beef in the store is also much more expensive than that bought outside)