How many room types can a hotel room upgrade all year round?

Hotel rooms can be upgraded to a room type in any season. According to relevant public information, all-season room upgrade service is limited to upgrading to the next room type, such as upgrading a standard room to a superior room. Established in 2005, All Seasons Hotel is a budget hotel chain brand under Shanghai Jinjiang International Hotel Group and one of the leading budget hotel chain brands in China.