Sun Jiahui, another postal staff member, said that the soundwave postcard was quite popular, and it already has the stamps attached so that customers can mail them out right away.

"The customized stamp printer is another popular attraction here. Customers can upload their own photos, and in just 15 minutes, they can obtain special stamps featuring their own pictures," she explained. "However, we only have 900 of these special stamps available."

On Sept 23, China Post released two commemorative stamps to commemorate the 19th Asian Games, which showcase the designs of the emblem and mascots.

Designed by Shao Lichen, these stamps are created using high-line intaglio printing and multicolor overprinting techniques to enhance their vibrancy. Their unique, irregular perforations are shaped like the "Three Pools Mirroring the Moon" formation in West Lake, a distinctive symbol of Hangzhou.

To add a layer of security, the stamps feature fluorescent ink technology, which, when held under a UV light, reveal several orange-colored Hangzhou landmarks, bringing regional characteristics to life.

Additionally, on the same day, the limited commemorative envelopes for the Hangzhou Asian Games, along with the design of the commemorative stamps for the opening and closing ceremonies, were also released.