A meeting of solidarity, friendship, and struggle, left to right: phan van dong, premier of the democratic republic of vietnam (north vietnam); samdech norodom sihanouk, cambodian head of state; chinese premier zhou enlai; prince souphanouvong, chairman of the laotian patriotic front; and nguyen huu tho, president of the advisory council of the provisional revolutionary government of the republic of south vietnam, 1971.