No, Wal-Mart and Carrefour have no stores in Bantian.
Longhua has RT Mart, over the rainbow Shopping Mall, China Resources Wanjia
over the rainbow Shopping Mall and China Resources Wanjia are all famous shopping malls in Shenzhen, and RT Mart just opened its first store in Shenzhen. The single store area is the largest in Baoan District, and it is also one of the top 5 enterprises in the world. It belongs to Taiwan Province enterprises.
To go to Longhua over the rainbow, you can take the 995 at Huawei, get off at Longhua over the rainbow and go to Longhua.