Zhengzhou and Shijiazhuang will do, because you are opening a shop and you have to find a provincial agent to make a profit, so it is impossible to purchase goods online. The wholesale market in Shijiazhuang can generally spread to Xinjiang, Inner Mongolia, Shanxi and other northern provinces, while the Zhengzhou market is also very lively and can be used for reference. The price is almost the same, basically the same, depending on your convenience. Good luck!