The article probably is right that the landlord might just want evidence to evict the tenants that pay a low rate. For example, the cameras might determine the

The article probably is right that the landlord might just want evidence to evict the tenants that pay a low rate. For example, the cameras might determine the exact number and the indentities of visitors and find that someone is staying for too long. Also, the landlord might be worrying that some of the tenants might secretly sublet their apartments or let their friends or relatives live there for free. And even if there is no violations, it can make tenants' life little less pleasant and motivate them to move out. It is interesting that while Chinese government wants to be able to control its citizens' lives using surveillance, capitalists and businesses have similar wishes. They want to be the dictators at least within their property.