1. Find the contact information on the official website of Taihe Ding Xin: The official website of Taihe Ding Xin usually provides the company's contact information, including telephone number and email address. You can find relevant information on the website, or consult through online customer service on the website.

2. Internet search: You can enter the keyword "Taihe Ding Xin" in the search engine to find relevant information. There may be other websites or forums that provide contact information of Taihe and Ding Xin.

3. Consulting through relevant institutions or trade associations: Taihe Ding Xin may be a member of trade associations or have cooperative relations with some institutions.