This way, the Liu family would not be completely cut off. They wouldn't be so tempted by the benefits that they might even kill their master.
However, Mu Huan had the intention to marry Liu Changfeng not because of her great-grandfather's assets but because of the benefits she had created.
Back then, Liu Changfeng wanted to find a person who knew Chinese medicine to participate in a research project. It was an experiment to slow down the aging of humans and let them live longer.
After she entered NST, she participated in this research project. The drug was also developed by her.
However, she had initially signed a contract with NST. To put it simply, 50% of the benefits she had created now would belong to NST.