8: 31 to 17: 11. According to the information of Changchun Wenlv, Changchun Zhongtai Ocean World officially resumed operation on May 31th. Business hours: 8: 31 am to 17: 11 pm (check-in is closed at 16: 31). Sino-Thai Ocean World is a project invested, constructed, operated and managed by Changchun Sino-Thai Ocean World Co., Ltd., which is a large-scale ocean theme MALL integrating popular science education, sightseeing, leisure and entertainment, shopping and catering.