Chen Pingping's leg had been injured because he had captured the Northern Qi spy Xiao En. In Joy of Life, Chen Pingping led the Black Knights to capture Xiao En, but this operation caused Chen Pingping's legs to be injured. Thus, it could be confirmed that Chen Pingping's leg had been injured from capturing Xiao En.

Chen Pingping's leg had been injured because he had captured the Northern Qi spy Xiao En. In Joy of Life, Chen Pingping led the Black Knights to capture Xiao En, but this operation caused Chen Pingping's legs to be injured. Thus, it could be confirmed that Chen Pingping's leg had been injured from capturing Xiao En.
Chen Pingping's leg had been injured because he had captured the Northern Qi spy Xiao En. In Joy of Life, Chen Pingping led the Black Knights to capture Xiao En, but this operation caused Chen Pingping's legs to be injured. Thus, it could be confirmed that Chen Pingping's leg had been injured from capturing Xiao En.
Chen Pingping's leg had been cut off during the operation to capture the Northern Qi spy Xiao En. Chen Pingping had led the Black Knights on a thousand-mile raid. In this operation, he had put in a lot of effort to successfully capture Xiao En, but it had also resulted in injuries to his legs. Thus, it could be confirmed that Chen Pingping's leg had been broken during the process of capturing Xiao En.
Chen Pingping's leg had been injured because he had captured the Northern Qi spy Xiao En. In Joy of Life, Chen Pingping led the Black Knights to capture Xiao En, but this operation caused Chen Pingping's legs to be injured. Thus, it could be confirmed that Chen Pingping's leg had been injured from capturing Xiao En.
Chen Pingping's leg had been injured during the operation to capture the Northern Qi spy Xiao En. Chen Pingping had led the Black Knights on a thousand-mile raid. In this operation, he had put in a lot of effort to successfully capture Xiao En, but it had also resulted in injuries to his legs. Therefore, it could be concluded that Chen Pingping's leg had been injured because he had captured Xiao En.
Chen Pingping's leg had been injured because he had captured the Northern Qi spy Xiao En. In Joy of Life, Chen Pingping led the Black Knights to capture Xiao En, but this operation caused Chen Pingping's legs to be injured. Thus, it could be confirmed that Chen Pingping's leg had been injured from capturing Xiao En.
Chen Pingping's leg had been cut off during the operation to capture the Northern Qi spy Xiao En. Chen Pingping had led the Black Knights on a thousand-mile raid. In this operation, he had put in a lot of effort to successfully capture Xiao En, but it had also resulted in injuries to his legs. Thus, it could be confirmed that Chen Pingping's leg had been broken during the process of capturing Xiao En.
Chen Pingping's leg had been injured because he had captured the Northern Qi spy Xiao En. In Joy of Life, Chen Pingping led the Black Knights to capture Xiao En, but this operation caused Chen Pingping's legs to be injured. Thus, it could be confirmed that Chen Pingping's leg had been injured from capturing Xiao En.
Chen Pingping's legs were not fake. Chen Pingping's leg had been broken because he had captured the Northern Qi spy Xiao En. In the movie, Chen Pingping led the Black Knights to capture Xiao En, but this operation caused Chen Pingping's legs to be injured. Thus, it was certain that Chen Pingping's leg was not fake.
Chen Pingping's leg was really crippled. In Joy of Life, Chen Pingping had been injured in the operation to capture Xiao En, the head of Northern Qi's secret service, causing both his legs to be crippled. Although some search results mentioned that there was a foreshadowing in the show that Chen Pingping's legs were not crippled, the descriptions of other search results unanimously showed that Chen Pingping's legs were indeed crippled because of that operation. Thus, it could be confirmed that Chen Pingping's leg was really crippled.