1. Contact Zijin Bank: contact the branch of Zijin Bank by telephone, online customer service or in person, and tell them to cancel the credit line.

2. Provide necessary information: provide relevant personal identification materials and account information.

3. Fill in relevant forms: Read and fill in the forms carefully to ensure accurate information is provided.

4. Sign the document: read and understand the relevant contents carefully, then sign at the designated location, and finally confirm the cancellation.