后杭爱省
In 1928, the Seventh Party Congress ushered in the “Leftist Period.” Sambuu supported and played an active role in implementing Soviet backed leftist policies of more rapid collectivization, land expropriation, and persecution of the Buddhist Church. He was dispatched to Arkhangai Province in 1930 to oversee collectivization of herders and confiscation of property belonging to nobles and the Buddhist Church. When violent uprisings in western Mongolia forced the curtailment of such policies in 1932, Sambuu deftly avoided the political blowback for the debacle that felled many of the party's most extreme leftists including Ölziin Badrakh, Zolbingiin Shijee and Prime Minister Tsengeltiin Jigjidjav. Between 1932 and 1936 Sambuu went on to work in provincial party administrative offices in Dundgovi, and Ömnögovi Provinces. In 1936, he led a department in the Ministry of Agriculture and Livestock.