Yachai Mengkao Temple was built by the founder of the Great City Dynasty. Its architecture is exquisite and magnificent. It can be said to be the oldest building in the Great City Palace. The temple is much better preserved than other temples, and the length of stay should be a little longer. Visits should be arranged in the morning, and the light taken is definitely better than in the afternoon. One of the famous scenery spots of Taizong is here, which makes him very famous in China. It's a red card spot in Dacheng.