Why did Kuang Superman's uncle seal up his father's house in The Scholars?

Kuang Superman's third uncle didn't seal up his father's house, but his father wanted to sell it because his family was poor, so he relied on his third uncle's house for more money. But his third uncle knew that his father was in a hurry to use money and wanted to buy it at a low price, and his father refused to sell it in a rage.

In order to buy a house, his uncle found the family that originally sold it to his father's house, that is, some relatives in the family wanted to redeem the house at the original price, but his father didn't want to, but Kuang Superman's brother couldn't stand the gossip of that family, so he accepted the sale, spent all the money in stages, and then separated, leaving his parents in this sold house.