April 07, 1950
Cable from Chen Yun, Bo Yibo, and Ma Yinchu, 'On Withdrawing the Northeast Business Delegation in Pyongyang and the North Korean Business Delegation in Shenyang'
Chen Yun, Bo Yibo, and Ma Yinchu announce that the Northeast Business Delegation in Pyongyang and the North Korean Business Delegation in Shenyang should be withdrawn and a new mechanism for economic exchanges with North Korea should be established.
February 12, 1955
Liaison Report from the Romanian Embassy in Pyongyang to the Ministry of Foreign Affairs, February 12th 1955, 550/55
In a report to the Romanian Ministry of Foreign Affairs, the Romanian Ambassador to North Korea describes his travels to Pyongyang and his discussions with Kim Il Sung and various other North Korean politicians about the current economic conditions in North Korea, as well as reconstruction efforts in Mukden (Shenyang) and Andong (Dandong).
May 09, 1961
4th Bureau of the Ministry of Public Security, 'Illegal Border Crossings by Ethnic Koreans Have Become Serious Recently'
The 4th Bureau of China's Public Security Ministry records that there are growing waves of illegal border crossings among ethnic Koreans in the area of Andong, Liaoning Province.