How many years can a person live? No need for a hundred years; just fifty years and he can no longer walk. But being an Immortal or a Buddha is completely different.
If you become an Immortal or a Buddha, you can live forever. If you want to live even longer, you need to diligently cultivate. After all, Buddhism is the master of this world. Has this mortal's mind been flooded with water? To forsake eternity for a mere few years of worldly pleasures as a mortal is absurd.
"Mr. Chen, if you follow the Tang Monk on his Journey to the West for Scriptures, it will be fraught with danger. Yet, you stand to gain much from it. Not only that, the merits you accumulate will not only increase your lifespan but also boost your mana. In the future, you can go anywhere you wish. Wouldn't it be wonderful to play with anything in this world you fancy?" Guanyin slowly tried to convey how beneficial it would be if he agreed to her proposal.