Complex sentence: Their descendants established the Tran dynasty, which ruled Vietnam (Dai Viet), and certain members of the clan could still speak Chinese, as when a Yuan dynasty envoy met with the Chinese-speaking Tran Prince Trần Quốc Tuấn in 1282.
Split into simpler sentences: Their descendants established the Tran dynasty, which ruled Vietnam (Dai Viet). Some of the mixed-blooded descendants and certain members of the clan could still speak Chinese, as when a Yuan dynasty envoy met with the Chinese-speaking Tran Prince Trần Quốc Tuấn in 1282.