C244 Mr Yu Is My Friend

Han Ya said in surprise, "Like what Mr. Yu said, since that day, although my grandpa was still taking that pill, the effect was obviously not the same as before. Chen Chuzhi explained that it was because grandpa had become resistant to that pill and told us not to worry, so he gave grandpa some defective products!"

Yu Jingzhe nodded.

If someone casually copied out the pills he had created