The warmer weather in Shenzhen

The typical humid weather in the south didn't improve until April in Tomb-Sweeping Day. It is suggested that the windows in the south should not be opened as far as possible, commonly known as "returning to the south sky", which means that the south wind brings humid air, which is easy to cause stagnant water and mildew. If there is a north wind, it is recommended to open the window to blow. The north wind is cold and dry.