When Si Jinghuai heard this, he had basically guessed most of what happened that year.

His face darkened slightly and he asked , " Does he know where the drug came from?"

Sang Yan played the second recording, which was exactly the same question as Si Jinghuai.

In the recording, Sang Yan was heard asking this question.

Doctor Li was either hesitating or thinking about this question.

Then he said , " Actually, you should know about this pharmaceutical ...