Long Stay Package, Up To 30% Discount On Best Available Rate For 14 Days Stay Dorsett Shanghai Hotel, China. Dorsett Shanghai Hotel in China offers you a 14 Days Long Stay Package offering up to 30% discount on best available rate including some great services: Free use of wifi. Free buffet breakfast for one person. 25% off laundry & dry clean service. Terms & Conditions: Period of booking & stay: Now until 31st December 2016. Use promo code: 14DAYLS.