which countries? Only China, or more?
"From the end of the war to the end of 1953, the US provided grants and credits amounting to $5.9 billion to Asian countries, especially China/Taiwan ($1.051 billion), India ($255 million), Indonesia ($215 million), Japan ($2.44 billion), South Korea ($894 million), Pakistan ($98 million) and the Philippines ($803 million). In addition, another $282 million went to Israel and $196 million to the rest of the Middle East.[123] All this aid was separate from the Marshall Plan.[124]"
https://en.wikipedia.org/wiki/Marshall_Plan
"Our story now moves to Asia and the southwestern Pacific, where, concurrent with the European Recovery Program, American aid was extended to China and Korea, to the Philippines, Indonesia, Indochina, Thailand, and Burma, and, through an emergency wheat loan, to India. Unlike the European Recovery Program, aid to Asia between 1948 and 1952 did not develop as a unified undertaking in behalf of a whole group of countries at once. It began with an authorization of aid to China, under the legislation which launched the Marshall Plan. Then, as of January 1, 1949, the President transferred from the Department of the Army to the ECA the responsibility of administering economic assistance to Korea; nearly 90 million dollars in unexpended GARIOA [Government and Relief in Occupied Areas] funds were turned over to ECA for this purpose. By 1950 continental China had fallen largely under Communist sway and the Foreign Economic Assistance Act of that year, approved June 5, authorized the use of residual China aid funds totaling more than 100 million dollars for economic assistance 'in the general area of China.' Under this authority, ptograms were initiated in the countries of southeast Asia and, in April 1951, the Philippines.." Harry Bayard Price,
The Marshall Plan and its Meaning (Ithaca, NY: Cornell University Press 1955), pp. 179-180
It should not be a surprise that the very legislation that authorized the Marshall Plan also authorized aid to China. The 80th Congress (which approved the Marshall Plan in 1948) was after all a Republican Congress, and conservative Republicans were highly interested in saving Chiang Kai-shek from defeat by the Chinese Communists. So including aid to China was necessary or at least helpful to assure passage of the bill.