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Compared to money, the kidney is more important.
Everyone knows that kidneys are in short supply, and even the wealthy might not be able to get the kidney they need when they need it. Yet, it's much easier to find a matching donor within the family.
Also, kidney transplants between relatives don't require the same complicated procedures as those involving external donors.
That's why Li Da'an approached Tang Tang.
As for why he didn't consider his three underage children, of course, it's because missing a kidney impacts the human body. Besides, some kidney donors need to have two ribs removed during the procedure, which is extremely painful.
A son is for carrying on the family line, and his daughters were too young; the eldest was only ten years old in nominal age. Li Da'an couldn't wait for her to grow up, and Liu Ying wouldn't agree to use her children's kidneys to sustain Li Da'an's life.
