Under the current visa-free regime for tourist trips, the usual limit is up to 30 days per visit. Verify the exact terms and whether the regime is still in force on the Russian MFA site and at the Chinese consulate before departure. Note: Hong Kong and Macau have their own entry rules — don't confuse them with mainland China. For routes, see the ready-made plans for Beijing, Xi'an and Shanghai and the seasonality on the China page.