The customer appointed a shipping company and gave me the contact information of the shipping company. What should I do after that?

Then contact the relevant personnel of the shipping company to confirm the date of shipment. If there is no cooperative forwarder in our company, you can ask the shipping company to recommend a forwarder. After all, services such as towing card customs declaration should be handed over to freight forwarders. The next step is to keep in touch with the freight forwarding company.