rely stopped. In 1960, USSR tore up 12 agreements, recalled all the experts in China, stopped 257 technological cooperation items, and refused to supply mineral resources like cobalt and nickel that China needed urgently and greatly decreased the export of machines and important accessories. All these brought great destruction to the economy of China. The trade amount sharply decreased to 827.9 million dollars in 1961,which was just half of the amount in 1960 and one third of the amount in 1959. In 1970, sino-USSR trade amount dropped to the lowest point in the historyonly 4.723 million dollars which was 2.25% of the amount of 1959. This number was only 1% of the total Chinese foreign trade and 0.2% of the USSR foreign trade. USSRs rank in foreign trade partners of China fell from the first one in the 50s to the fourteenth. To pay back the loans borrowed from USSR, China decreased import as well as increased export. From 1961 to 1965, the trade surplus of China to USSR added up to 950 million dollars.Table of Sino-USSR trade amount in the 60s(unit: ten thousand dollars)YearTotal trade amountExportImportProportion to Chineseforeign trade (%)196119621963196419651966196719681969197082 791 70 158 60 106 44 522 40 744 30 514 11 141 9 214 5 422 4 72353 626 49 06640 678 31 164 22 167 14 041 5 547 3 293 2 724 2 317 29 16521 09219 428 13 358 18 57716 473 5 594 5 921 2 698 2 40628.226.420.612.99.66.62.7 2.31.31.03Original resources: Chinese Foreign Economics and Trade Annual There were also some changes in goods structure in the 1960s. Since China had petrolic products form USSR since 1966. Machines were still the body of Chinese import from USSR, but the quantities greatly reduced. For example, in 1960 USSR exported machines worth of 450 million rubles, which was only four percent of the total machine export when it came to 1965. China stopped to export rice and soybean to USSR because the reduction in agricultural p...