We had been getting used to eating supper very late. So it was necessary to turn on the lights every evening. As a result mosquitoes were attracted into our rooms. Mother suggested to advance the time for dinner with regard to this matter. For recent three days we have been taking supper before dark. Then there was no need to switch on the light. And no mosquitoes could be heard any more indoors. It was good for the kang to cool down before mother retired. Mother could also walk out of the house to enjoy the cool after supper. This could promote her digestion as well.