If you buy it, you usually buy it in an intermediary or some big data companies. You can get relevant channels through Baidu.

Introduce you to several channels that can be inquired;

① You can find some registered companies on the B2B website, and generally have relevant contact information, so you can contact them directly;

② You can also find some potential company users in 58 cities, Jiji.com and these websites, and contact them directly by telephone;

(3) Check the ranking of Baidu bidding companies and directly obtain contact information and telephone contact;

I hope it helps you! Hope to adopt!