Why do many Taobao merchants not deliver to Hainan?

Because the shipping cost is expensive. Hainan is separated from our mainland by the Qiongzhou Strait. If you want to ship things to Hainan, you have to cross the sea. Due to the steepness of the Qiongzhou Strait, the cost of building a bridge is very high. So far, it is mainly transported by ship, which is time-consuming and often affected by the weather. Therefore, the transportation cost to Hainan is also relatively high, resulting in many merchants not shipping to Hainan