January suits a trip built around one clear preference: winter sightseeing or time on Hainan. Combining the two means packing for very different conditions.
Weather and regional differences
Beijing is cold, while Hainan offers a much milder alternative. Shanghai and the nearby water towns are also winter destinations, so do not pack for the whole journey as if it were a beach holiday.
Where to go
Choose Shanghai and Sanya if you want a city stop before the coast. The Shanghai–Beijing–Sanya route adds northern heritage sights; allow a change of pace and clothing when you move between regions.
How to plan your days
Keep outdoor winter visits shorter and alternate them with museums or other indoor stops. If warm weather is your priority, spend more of the available nights in Sanya rather than adding another northern city.
What to pack and check
Pack a warm outer layer for northern stops, comfortable closed shoes and separate lighter clothing for Hainan. Lunar New Year can fall in January or February; check the holiday calendar before choosing travel dates.
