Does one need to book tickets in advance for an aquarium and zoo? Can tickets be purchased upon arrival?

Alright, I just went to the zoo, there were a lot of people. It closes at 5 p.m. in the afternoon during the off-season, remember to arrive early.
On-site purchase and advance reservation are both acceptable; you can purchase combined tickets or separate ones.
No reservation required, you can purchase separately online, or buy a combined ticket. Purchasing on-site is also an option.
It is required to make an appointment for the big entrance ticket first, and then purchase tickets for each venue after admission, so as to choose according to personal preferences.
You can buy it when you get there, the price won’t be any higher, there’s no difference.
No reservation required, just buy a ticket at the gate upon arrival, regardless of the tourist off-season.
OK, I just went to the zoo, it’s pretty crowded. The zoo closes at 5 pm in the afternoon during the off-season, remember to arrive early.
On-site purchase and advance reservation are both available; you can buy a combined ticket or separate tickets.
No appointment is required. You can purchase separately online, or buy a combined ticket. Purchasing on-site is also acceptable.
You need to book the main entrance ticket in advance, then purchase the tickets for each venue separately after admission, so that you can choose according to your personal preferences.
It’s okay to buy when you get there; the price won’t be any higher, there’s no difference.
No reservation is required; you can simply buy a ticket at the entrance when you arrive. You can purchase and enter to play directly, regardless of whether it’s the off-season or peak tourist season.
No reservation required. I bought the zoo and panda house tickets in advance. I watched the pandas first and then saw the other animals. In the evening, I bought the night session tickets for the oceanarium alone with the children.
No reservation is needed, of course it’s best to buy the combined ticket online in advance, 170 yuan, or you can choose not to go to the aquarium, the zoo is 10 yuan, and the panda house is 5 yuan.