sentences:  Ma Buqing's troops were involved in road construction, for the movement of war supplies to Chinese forces fighting against Japan, having built a route to Russia and was planning another route via Tibet.In July 1942 Chiang Kai-shek instructed Ma Buqing to move 30,000 of his troops to the Tsaidam marsh in the Qaidam Basin of Qinghai.Chiang named Ma Reclamation Commissioner, to threaten Sheng Shicai's southern flank in Xinjiang, which bordered Tsaidam.