Dalian Seashell Museum, also known as Dalian Castle Museum, is the biggest one of this kind in Asia. The 1st floor is the museum and the above is hotel. It was built in 2000 and put into use in 2003.
According to the report in 2006:
"The castle will be sold for 260 million RMB ($39 million USD). The original squarefootage was planned to 31500 sqm (339063 sqf), including public facilities in the front, 3 residential towers with 11 stories, 13 stories and 15 stories respectively. There was supporsed to be the sailing museum. Although since July 17, 2003 the Seashell Museum was open, most areas have been empty for a quite while. ..."