Why can't Kong Yiji walk out of Xianheng Hotel?

Xianheng Hotel still has the chalk board of the clerk's account, "Kong Yiji owes 19 money", knowing that no one has paid back this 19 money, but he still remembers this account, which shows that the shopkeeper's scheming is not on this 19 money. As long as there is this account, it is doomed that Kong Yiji will never leave Xianheng Hotel. When people come here to eat, people will look at the chalk board and talk about him year after year. In Lu Xun's Kong Yiji, it was originally written that Kong Yiji did not default and occasionally had no cash. When he wrote it on the chalk board, it was all paid off soon. Although the only man in a gown in this pub looked down and out and made people laugh at him, he kept his promise, but in the end he was unable to repay the nineteen dollars.