The Sino-Soviet conflict over the Chinese Eastern Railway (KER) worsened the bilateral relation. On 19 July 1929, the Soviet Union discontinued its diplomatic relation with the Republic of China, will all diplomats recalled or expelled to their home countries. The Soviet Union suspended railway communication and demanded that all Chinese diplomats leave Soviet territory. The Soviet Government forced the Chinese to move to Northeast China. Thousands of Chinese in Irkutsk, Chita and Ulan-Ude were arrested due to reasons including breach of local orders and tax evasion. When they were to leave Russia, any Chinese to cross the border with more than 30 rubles in cash will need to pay the surplus to the authority. 1,000 rubles in cash to cross the border would make them arrested, with all the money confiscated.