The Big Bang Theory Wiki

Chinese Leonard is a Chinese version of Leonard Hofstadter.

He appears in the final scene of "The Cooper-Hofstadter Polarization" where he and Chinese Sheldon watch Howard's uploaded YouTube video of Sheldon and Leonard fighting at Leonard's presentation.

Howard then uses the Internet to switch their lights on and off.

It's unknown if he is really like Leonard in terms of personality, given that he only makes a brief appearance and that he is only dressed as Leonard.