Why is Hainan duty-free mailing slow?

There may be the following reasons for the slow speed of duty-free mailing in Hainan:

1. Traffic problem: In order to save money, express companies in Hainan use train ferries for transportation, which may lead to prolonged transportation time.

2. Weather impact: Frequent typhoons and suspension in Hainan may affect the transportation and mailing speed of duty-free goods.

3. Transfer process: As Hainan duty-free goods need to be transferred into and out of the country, this process may take some time, thus affecting the mailing speed.

In short, the slow speed of duty-free mailing in Hainan may be caused by many factors. It should be noted that the above reasons are only speculation, and the specific situation may be different according to the actual situation.