How many days does it take for Tmall Express to deliver goods from Langfang to Shunyi?

About 1 day. This is just an approximate time estimate, because the courier collects the goods and then sorts them. After arriving in a city, they need to be sorted again. After arriving at the destination, they still need to be sorted and delivered, which all takes time. There are also road conditions during transportation, the speed of sorting by couriers, etc., which will all affect the arrival time of express delivery, and the time may be advanced or extended.