To verify a trade company in Kaiping, a city located in the southern part of Guangdong Province, China, you would follow these general steps:

1. **Check Official证件**: The first step is to request the company to provide their registered business license (Gongsi Zhengce) and any relevant registration certificates, like Tax Registration Number (Ci關號).

2. **Verify Online Information**: You can visit official government websites like the China Corporate Register System (CCRS) or the local Kaiping bureau of commerce website, where you can search for the company by name or registration number.

3. **Check Company Reputation**: Look for reviews or complaints about the company online. This can provide valuable insights into the company’s reliability.

4. **Contact the Local Trade Association**: If available, you could also contact the local trade association in Kaiping, which could provide official confirmation of the company’s existence and status.

Remember that verifying a trade company involves multiple steps and it’s crucial to cross-check information for accuracy.