What should I do if I block the ventilation and lighting of shops without authorization?

Building in accordance with the provisions of Article 89 of the Property Law shall not violate the relevant national engineering construction standards, and shall not interfere with the ventilation, lighting and sunshine of adjacent buildings.

First of all, we should communicate with the perpetrators of occlusion, clarify their infringement and express their demands. One is to ask the infringer to restore the original state, and the other is to negotiate a reasonable and acceptable compensation plan. If the other party ignores it, or the compensation scheme is unreasonable, it can bring a lawsuit to the people's court.