As far as I know, you don't have many choices. There are only two securities companies in Haining, namely Zheshang Securities Co., Ltd. Haining Shuiyueting West Road Securities Business Department and CITIC Jintong Securities Co., Ltd. Haining Xiaxi Road Securities Business Department.
Both companies are local brokers, but Jintong is a CITIC company with stronger strength, smoother channels and fewer problems, but the handling fee is more expensive. As far as I know, Zheshang Securities is a small brokerage firm, and the handling fee may be cheaper.
If you have questions, you can continue to add them.