Is pi a cooperation between Chinese and American governments?

Yes Pi is a cooperation between Chinese and American governments. Sino-US scientific and technological cooperation agreement is a document issued by relevant departments of China and the United States. 1972 after the publication of the Shanghai Communiqué between China and the United States, the exchange of scientific and technological personnel between the two countries has developed. However, because the relationship between the two countries has not been normalized, the scientific and technological cooperation and exchanges between China and the United States have been restricted to some extent.