Li Undyne_ Kwancheng is a Chinese professional player.

He began his pro player career in 2019 with teams such as OmgGtm, Coup de Grace, and G3 gaming. In 2022, Li joined CDEC Gaming, with which he advanced to DPC CN 2021/2022 Tour 3: Division II. In the qualification for The International 2022, the team finished in sixth place.

In December 2022, Undyne_ joined Team Bright. In March 2023, the team advanced to DPC CN 2023 Tour 2: Division II, where they finished in second place. In 2024, they managed to qualify for the Elite League as part of kev. However, in the tournament itself, the roster finished last, failing to make it out of the group stage. Subsequent attempts to qualify for the DreamLeague Season 23, PGL Wallachia Season 1, as well as Riyadh Masters 2024 and The International 2024 did not see Undyne_ 's team advance past fourth place in the closed qualifiers.

In February 2025, Li joined Xtreme Gaming and competed at DreamLeague Season 25, where the team finished 13th. In March, the team competed at PGL Wallachia: Season 3, where they finished in 5th-6th place. In April, Undyne left Xtreme Gaming.