Recently, selective RET TKIs, selpercatinib and pralsetinib, were approved for RET positive solid tumors by FDA. SY-5007 was well tolerated in patients. Preliminary antitumor activity was also observed in patients with advanced RET-fusion positive NSCLS and RET mutant MTC. The pivotal Phase II clinical study of SY-5007 in NSCLC patients is ongoing.