Alipay / WeChat Pay is primary — set up real-name verification before you fly. Keep some cash as backup.
eSIM or roaming (Trip.com / Klook). Navigation: Amap 高德地图. Rides: DiDi. Food: Meituan.
27–35°C, humid. T-shirt/shorts + a light sun layer. Plug type I/A — bring an adapter.
Power banks must be ≤20,000mAh with 3C mark — carry-on only, never checked baggage.