錢有更多東西為國際接受。直到最近西方還有人在繼續他的研究。隨便狗一下發現：

"Tsien's method for generating non-Keplerian trajectories"
P. MURAD, U.S. Defense Intelligence Agency, Washington, DC 
29th Aerospace Sciences Meeting, Aerospace Sciences Meetings 
https://doi.org/10.2514/6.1991-678 
https://arc.aiaa.org/doi/abs/10.2514/6.1991-678

“Tsien's method for generating non-Keplerian trajectories.”
Part 2: The question of thrust to orbit a sphere and the restricted three-body problem
https://archive.org/details/nasa_techdoc_19930015529

“DROMO formulation for planar motions: solution to the Tsien problem”
https://link.springer.com/article/10.1007/s10569-015-9613-8