YofoaStudio Actually, it's not necessarily necessary to go to Beijing. My idea is that perhaps the un-sorted cards could be sent directly from Beijing to the ham operators who are willing to sort them. This would avoid the need for Beijing to complete the enormous task of preliminary sorting of all the cards nationwide.
Then, volunteers can directly sort and send them to various locations. If possible, they could even skip the numerical sorting step and directly sort and mail them to provincial card distribution areas. This would save a step and potentially improve efficiency.