Why can't the US group take-out contact the rider by typing?

This paper mainly introduces how to send a message to contact the rider for the US group takeaway. Please follow the following steps to set it up. Enter the Meituan, and then click My in the lower right corner. After entering my home page, we click on my order. At this point, on the My Orders page, click the open order you want to contact. At this time, on the order page, we can slide down the page, find and click the contact rider to enter the page, and then we can directly send a message to contact the rider.