In the A-shares market, there are only 5 companies that qualify as equipment providers in the strict sense—Huahai Qingke, Shengmei Shanghai, Tuo Jing Technology, Zhongwei Company, and Xinyuan Micro. Meanwhile, Huahai Chengke and Zhongju Core are materials companies, and Huarong Hongli is a contract manufacturer/OEM—they’re also not bad.

Note: Most of the above are STAR Market stocks, and the threshold is 500,000 yuan in assets plus 24 months of trading experience.
If you don’t have access to the STAR Market or you don’t want to buy individual stocks, the most worry-free option is to buy an ETF.
For more details, check the research report analysis I’ve written.
#BigA