In the end, neither Chen Yuan's father nor his mother was willing to have their arm chopped off.
His father said that if one of his arms was cut off, it would affect his gambling posture and his luck. He couldn't afford to lose; he had to win money because he was supporting their home by winning at gambling!
His mother said that if one of her arms was chopped off, she wouldn't be able to pour a drink with one hand and hold a cup with another, which would slow her down when drinking. She had recently been winning money by outdrinking others, if she couldn't outdrink them anymore, not to mention not winning any money, she would have to pay for all the drinks she had drunk.
After a quarrel, they found that neither would back down, so they both turned their attention to their son.
Their arms were both useful, but their son's wasn't!