Tankuang was a Chinese monk active during the eighth century. His texts were found in Dunhuang at the beginning of the twentieth century, and only then included in the Taishō canon. Tankuang wrote several commentaries on numerous Mahāyāna sutras, and two of these texts are commentaries on the Dasheng qixin lun. This paper focuses on the influence of two Korean monks, Wonch’uk and Wonhyo, on Tankuang’s commentaries. Whereas it seems clear that Tankuang was affiliated to the Ximing lineage of Wonch’uk, there is no such evidence concerning the influence of Wonhyo. But it appears that Tankuang is taking over some of the concepts introduced by Wonhyo, and there are some clear cases of textual and doctrinal evidence of this influence that I will present in this paper.