Regarding the French Indochina that could have been a crippling blow to the Viet Minh movement as Ho Chi Minh was in China prior to the ISOT.
Thailand would surely be put at ease by the fact that the Vietnamese forces that occupy the neighbouring Cambodia with its armoured division ready to invade Bangkok through the eastern plains are now gone - but the Cambodian refugee groups on its border region such as the one in Khao-I-Dang set up after the fall of Khmer Rouge would prove to be troublesome.
The PRC would not only be concerned about the sudden reappearance of imperialist forces its doorsteps but also the French concession zones in Guangzhouwan, Shanghai, Guangzhou, Hankou(part of modern Wuhan), Tianjin and the Kunming-Haiphong railway.