Do gas stations allow billboards?

No billboards are allowed in gas stations.

Advertising is business. Without the permission of the state for industry and commerce, gas stations shall not set up hard-core billboards and shall not publicize for other enterprises. If there is such behavior, you may have the purpose of using advertisements to attract investment. It is not allowed without permission. However, if the industry and commerce permit, you can use billboards to promote other enterprises and advertise for profit.