Why is there a special freight charge for hairy crab express delivery?

First of all, I want to tell you that hairy crabs are fresh, and these items are within the scope of our country's restricted delivery. Express delivery companies are generally reluctant to accept such orders. I think the reasons are as follows (for reference only):

1, the distribution of fresh products is strictly regulated in China, and a series of quarantine work must be done before delivery;

2. Hairy crabs are fresh animals, so they should be handled carefully to avoid squeezing and keep a certain temperature. During transportation.

3. Fresh animals like hairy crabs must be insured, otherwise pollution and loss will be avoided after being transported to the destination.

The above is my experience in express delivery. I don't know if you can satisfy such an answer.