Why did Pinduoduo refuse express delivery?

The refusal methods of Pinduo are as follows:

Tools/materials: iPhone 12, IOS 14.4. 1, Pinduoduo 5.83.0.

1. Open Pinduoduo APP, click Personal Center in the lower right corner, and click My Order.

2. In my order, check the delivered logistics information. Call the courier directly to explain that the courier was rejected.

If the courier has delivered it, you can wait for the courier to deliver it and let it be returned.

If the courier has signed for it, you can call the courier directly and ask him to return the courier in time.