From five to nine in the morning. Haikou, also known as Coconut City, is the capital of Hainan Province and the core city of China (Hainan) Pilot Free Trade Zone (Port). Haikou Dingzhen Antique City is the most lively place in this area. Many people like to come here. The morning market time is from five to nine in the morning. After this time period, the evening time is the busiest time.