Question: Who directed the original South Korean version of the 2015 Chinese comedy film, 20 Once Again?
Sentence (from "20 Once Again"): 20 Once Again (Chinese: 重返20岁 "Chóng fǎn èrshí suì") is a 2015 Chinese comedy film directed by Leste Chen and starring Yang Zishan, Gua Ah-leh, Bolin Chen and Lu Han.
Relevant evidence: No