Are there no cockroaches living on the 29th floor in Guangzhou?

No, according to relevant information, cockroaches have little to do with the floor. The reason for cockroaches is that there are food scraps at home to attract cockroaches into the house, and cockroaches climb into the house along the sewer. There are cockroaches in the neighbor's house next door, and they climb into the room along the passage. The cockroaches are attached to the courier box or plastic bag and inadvertently brought into the house.