In many places in China, I go to the planetarium to watch it. It is actually free, but I come to Pingtang to the location of Tianyan. If I want to see the Pingtang International Astronomical Experience Hall, I need to pay tickets. This is also the reason why many people complain that this experience hall is not very good. Because everyone is not staying here for a long time, so if you are not living here for a day or staying for a day to play, this experience hall can give up.