Zhang Heng looked at the college student in front of him. The latter was akin to the proverbial inspirational protagonist from a soap opera who had overcome many difficulties, defeated mental illness, and finally regained a new life. All the gloominess that surrounded him seemed to have gone.
He stood there, talking about how he overcame all the difficulties that he faced in his life, even mentioning how bad he felt for allowing his parents and friends to be worried sick of him. His emotions, actions, or expressions were flawless, and judging by the lady cashier's response; it appeared that the prodigal son had now returned.
Mental illness could be categorized as a disease itself. Only a minute fraction of people could heal themselves, and it usually took a very long time.