Why does Beijing send Beijing to Cangzhou for express delivery?

Because the transfer point and sorting office of Beijing Express are all in Cangzhou. Express delivery has sorting offices and transfer stations in every province and city, and each express delivery needs to pass through one or more transfer stations. The first transit center of Beijing Jiao Tong is in Cangzhou, and the second transit center is in Langfang, Hebei, and Beijing Jiao Tong is closer to Cangzhou, so it should be sent to Cangzhou transit center.