North (Beijing, Northeast)
Winter: bitterly cold, below -20°C — thermal + sweater + down jacket. Summer: hot and dry, 35°C+.
East China (Shanghai, Hangzhou)
Summer: muggy. Winter: damp cold — insulating mid-layer + down jacket essential. Plum Rain Season (Jun-Jul).
South China (Guangdong, Hainan)
Summer: long, hot, humid. Winter: mild — light jacket enough. Typhoon Season (Jul-Sep).
Southwest (Chengdu, Chongqing, Yunnan)
Chengdu/Chongqing: damp winters, muggy summers. Yunnan: spring-like year-round but extreme day-night温差.
General Principle
Layering: base (moisture-wicking) + mid (insulation) + outer (windproof/waterproof).