Here's the yt title:
My 【Invest in My Wife】System:10,000x Return!Gave her 1 Health Potion, got 10 SSS Health Potion Back!
This novel happened in the modern era with martial artist with cultivation. The mc is just a nobody. But after he turned 18 and has to choose a wife(tradition of their world)he found a girl who is abandoned by his family. But the girl is special, she have a special physique and a powerful spirit inside her so naturally the system choose her as one of the mc that he can get investment from(only from destined individuals) as time passed and the 2 of them got married. He invested a lot of pills and other stuff to his wife. So naturally the mc also grow stronger.
(I can't give more info lol too lazy)
Name of top characters:
Mc(Su Chen)
Wife(Su wangqing)