Marriott International has expanded its Asian portfolio with the opening of the 507-bedroom Renaissance Sanya Resort & Spa in Haitang Bay, China.

Developed by the Sanya Zhonggang Fishery Co, the property has been designed by WATG and reflects its locale in China's tropical Hainan Island.

The hotel's Quan spa will be managed in-house and boasts 16 self-contained treatment rooms with private changing facilities, a lap pool, steamroom, therapy baths and a relaxation area.

Eight of the treatment rooms are designed with deep sunken baths and another eight are fitted with Vichy showers.

The treatment menu will include body wraps, facials, pedicures and massages.

The resort also offers seven food and beverage outlets and 14 private dining rooms, including six on 'floating islands', and 10 private two-bedroom villas with a personal pool.

For families and children the resort features "R-Cade," which includes a 10-pin bowling alley, private cinema and individual Wii, Xbox and PlayStation zones.

Renaissance Hotels, Marriott's upscale brand, now includes more than 145 properties in 30 countries.