Does the audio guide support Chinese? The order only mentions multilingual support, is there pre-sales customer service? I'm afraid to place the order as the order cannot be refunded.

There are, the ticket you bought includes a guide device. Tell the staff you want a Chinese explanation, and they will arrange it for you. If there isn’t one, you can also rent a guide device on the spot.
At the scene, you can choose Chinese for the讲解 machine, like a phone, but there are no headphones. It is recommended to bring your own headphones, otherwise you will have to hold it up to listen like a walkie-talkie, which is quite cumbersome.
There is Chinese, just rent on the spot.
There is, the ticket you bought includes a guide device. Tell the staff that you want a Chinese explanation, and they will take care of it for you. If there isn’t one, you can also rent a guide device on the spot.
At the venue, choose Chinese for the explanatory machines, like a phone, but without headphones. It is recommended to bring your own headphones; otherwise, you will have to hold it up to listen like a walkie-talkie, which is a hassle.
There is Chinese, just rent on the spot.