have made positive contributions. The Chinese people regard every victory achieved by the fraternal Mongolian people on their path forward as their own and rejoice in it wholeheartedly.
China and Mongolia are close fraternal neighbors with a long-standing traditional friendship. Our peoples have been closely linked through our shared cause of protracted revolutionary struggle and socialist construction. We have always sympathized with and supported each other. The friendship and cooperative relations of mutual assistance between our two countries, founded on the principles of Marxism-Leninism and proletarian internationalism, are unbreakable.
The Conference of Representatives of Communist and Workers’ Parties held in Moscow in November 1960 further strengthened the unity of the socialist camp and the international communist movement, greatly inspiring the peoples of the world in their struggle for socialism, national liberation, democracy, and world peace. We firmly believe that, based on the declaration adopted at the Moscow Conference and under the banner of Marxism-Leninism, the relations of friendship, solidarity, and mutual assistance between our two countries will surely continue to develop.
We wish the Mongolian people new achievements in their struggle to build socialism and safeguard world peace. May the unbreakable fraternal friendship between the Chinese and Mongolian peoples endure forever.
Mao Zedong, Chairman of the Central Committee of the Communist Party of China
Liu Shaoqi, President of the People’s Republic of China
Zhu De, Chairman of the Standing Committee of the National People’s Congress of the People’s Republic of China
Zhou Enlai, Premier of the State Council of the People’s Republic of China
July 10, 1961

In 1961, Mao Zedong was in Hangzhou.

Comments on a document concerning Japan’s economic policies and the development of its defense industry [1]
(July 13, 1961)
Comrades Lin Biao, He Long, Rongzhen, and Ruiqing:
[!]
Refers to an internal document issued on July 6, 1961. The document states that in February 1960, at the request of the Japanese Defense Agency, the Japan Financial and Fiscal Affairs Research Association submitted an internal report titled “Analysis of the Defense Industry from an Economic Policy Perspective.” The chairman of this association, Takeo Fukuda, currently serves as the chairman of the Liberal Democratic Party’s Policy Research Council, while its advisor, Masamichi Yamaji, is now the governor of the Bank of Japan. The main points of the report are as follows: First, the starting point for Japan’s national defense and arms production: (1) Japan’s defense system should differ from those of Europe and the United States and can only be conceived from the perspective of localized warfare. (2) Greater emphasis must be placed on the relationship between weapons production and national strength; the current level of development in modern military science has already surpassed what Japan’s national capabilities can support. (3) The idea of joint U.S.-Japan responsibility for Japan’s national defense should be implemented, adopting a system of joint U.S.-Japanese defense. Second, future directions for Japan’s national defense and arms production: (1) The focus of Japan’s national defense should be maintaining the combat effectiveness of ground forces and maritime logistical support capabilities. (2) Japan’s arms production should be limited to items that can be manufactured concurrently with civilian goods. (3) Air defense, requiring high-performance combat aircraft, should be assumed by the United States. Third, existing imbalances in Japan’s current national defense and arms production: (1) There is a relative excess of ground force personnel, placing an excessive burden on air force aircraft. (2) Arms production policies neglect the effective utilization of ground and naval combat power, running counter to developments in both domestic and international situations. [2]
Lin Biao, who at the time was Vice Chairman of the Central Military Commission of the CPC, Vice Premier of the State Council, and Minister of National Defense.
He Long, who at the time was Vice Chairman of the Central Military Commission of the CPC, Director of the National Defense Industry Commission, and Vice Premier of the State Council.
Rongzhen refers to Nie Rongzhen, who at the time was Vice Chairman of the Central Military Commission of the CPC, Vice Premier of the State Council, and Director of the Science and Technology Commission. Ruiqing refers to Luo Ruiqing, who at the time was a member of the Standing Committee and Secretary-General of the Central Military Commission of the CPC, as well as Chief of the General Staff of the People’s Liberation Army.