Ju was born in the Jilin province to a Chinese father and a Korean mother in 1995.
Ju became a South Korean citizen in 2007 and played youth baseball in South Korea.[1]
On May 27, 2016, he recorded nine scoreless innings, four hits, and four strikeouts against Nexen, recording his first complete victory in his debut.[2][3]
Ju announced prior to the 2023 World Baseball Classic that, while he would play for China, he would not pitch against South Korea if the two teams faced each other. He further said that he would have preferred to play for South Korea if he had been selected.[5]
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