Shenzhen has a resident population of 4.05 million. The main ethnic group is Han, and the official language is Mandarin. Shenzhen amp The subtropical maritime climate of the United States is suitable for traveling all year round, with long summers and short winters. The annual average temperature is 22.4 degrees, the highest temperature is 36 degrees, the lowest temperature is 1.4 degrees, and the rainfall is abundant. This is a beautiful coastal city with mountains and water. Shenzhen …