Let KAYAK do the searching
Based on KAYAK hotel searches, the most popular destination is Hong Kong (82% of total searches to China East Coast). The next most popular destinations are Shanghai (10%) and Guangzhou (6%). Searches for hotels in Shenzhen (2%) are also popular.
KAYAK users have found double rooms in China East Coast for as cheap as $10 (Beihai) in the last 3 days. The average price is $175.