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December–FebruaryHarbin for ice and snow; Guangzhou for a milder winter city trip; Dali as a flexible scenic alternative.Match winter with a snow itinerary, move south for a warmer urban route, or use Dali when you want a flexible scenic base.Harbin needs serious cold planning; Guangzhou is milder but not a universal dry-weather promise; Dali’s mountain conditions can change.
March–MayBeijing–Xi’an–Shanghai for the classic route; Shanghai for urban spring walking; Dali for an Erhai and highland spring option.Choose classic-city walking, Shanghai parks and outdoor sights, or Dali landscapes.Keep April 4–6 and May 1–5, 2026 visible when booking trains, hotels, and attraction reservations.
June–AugustXinjiang/Ili and other elevation or grassland routes; Tibet only after route, altitude, and permit checks; Harbin as a cooler-city option.Use the season for grassland, mountain, or highland goals rather than treating lowland classic cities as the default.Build heat, rain, altitude, road, and current operating-condition backups into the route; keep the trip if summer is the only leave window.
September–NovemberBeijing–Xi’an; Shanghai; Dali; and Xinjiang/Kanas for autumn scenery.Use post-holiday October for classic-city walking, Shanghai autumn, Dali’s shoulder season, or Kanas autumn color.October 1–7, 2026 is the National Day movement peak; after it, route transfers need less holiday-specific planning.