China Post issued a set of one postcard featuring the Shen Yang's September 18 Incident History Museum as well as a postcard stamp with a denomination of 0.8 yuan (0.1167 U.S. dollar) on September 18, 2018.

The September 18 Incident was an event staged by Japanese military personnel as a pretext for the Japanese invasion in 1931 of northeastern China, known as Manchuria.

On 18 September 1931, Lt. Suemori Kawamoto detonated a small quantity of dynamite close to a railway line owned by Japan's South Manchuria Railway near Mukden (now Shenyang). The explosion was so weak that it failed to destroy the track, and a train passed over it minutes later. The Imperial Japanese Army accused Chinese dissidents of the act and responded with a full invasion that led to the occupation of Manchuria, in which Japan established its puppet state of Manchukuo six months later. The deception was soon exposed by the Lytton Report of 1932, leading Japan to diplomatic isolation and its March 1933 withdrawal from the League of Nations.

The entire episode of events is known in China as the "September 18 Incident”.

The Shen Yang's September 18 Incident History Museum is located in the place where the September 18th Incident took place. It is the only museum in China and abroad that fully reflects the history of the incident.

It is now a national museum of prime importance, and serves to educate and remind of the atrocities committed by the Japanese against the Chinese in World War II.

Since its establishment, the Shen Yang's September 18 Incident History Museum has been responsible for “collecting historical memories and displaying historical facts.” It focuses on the collection, display, research, external publicity and education using cultural relics and historical materials from the September 18th Incident.

The museum focuses on the history of Japanese imperialism and the planning and launching of the September 18th Incident, and humiliating the brutal colonial rule in Northeast China through a large number of cultural relics, historical photographs and a variety of modern means of display.

It vividly reproduces the history of the people in Northeast China, and how they, together with the people of the whole country, fought a bloody battle under the leadership of the Communist Party of China (CPC), and finally won a great victory in the War of Resistance against Japan.

The postcard stamp features a tablet made by the Japanese army, which is the landmark building of the museum, against the main hall of the museum.

The postcard was designed by Li Chen, a professor at the Lu Xun Academy of Fine Arts, and was printed by the Beijing Stamp Printing House.

Offer for sale: This set of stamps is available at designated postal outlets, the online philatelic shop of China Post (http://jiyou.11185.cn), China Philately mobile client and the China Philately Wechat Mall since they were issued on September 18, 2018. This set of stamps will be sold for six months.