According to the provisions of Civil Law, Marriage Law and Criminal Law, adult and capable children have the obligation to support their parents. Parents here include biological parents and legal adoptive parents, but do not include in-laws or in-laws. Strictly speaking, they are still in charge of each other.
The support here includes material support and spiritual comfort, including disease treatment. Children should provide medical expenses for their parents, which is a legal obligation, but the law does not clearly stipulate the specific amount. In principle, they should bear the full amount, but the children can't afford it themselves. Generally, it should be borne according to the proportion of income, especially for minors whose children need to be raised after marriage. The law will also consider this. After all, it is a legal obligation to support parents and raise minor children.
But as far as China's traditional morality is concerned, parents have worked hard all their lives, and when they are sick, they need to take care of them most. Generally speaking, as children, as long as they have a conscience, they will not go to destruction. At the very least, there is no regret in being a man, and the virtue of respecting the elderly needs to be passed down. If their children are unfilial, their children will follow in their footsteps, which will make people feel chilling from generation to generation.
As far as son-in-law/daughter-in-law is concerned, there is no legal obligation to support father-in-law or in-laws. However, during the marriage relationship, the cost of treating one parent belongs to the joint expenditure of husband and wife, so the debt generated is the joint debt of husband and wife, and both parties have the obligation to repay it. In addition, the son-in-law/daughter-in-law who voluntarily assumes the main support obligation to support the spouse's parents after the death of the spouse can also inherit the inheritance as the first heir.