Just searched the building materials market in Xuchang. As for what you want to buy, I'm not sure if there is anything in the building materials market. The following is for your reference:

1. There is a big one in the yard of Xinxing Road Materials Bureau.

2. South Wenfeng Road, just take 102. It's called Asia-Europe Building Materials Market.

3. In Xuwan, East District, at the intersection of Wei and Liancheng Avenue, there is a Shanghai City, which is also a big building materials market.

4. There is also the southern section of Wenfeng Road, and there are many on both sides of the intersection of Wenfeng Road and Yucai Road to the south road.