You are a joint-stock company, and each shareholder holds the same share, which is 25%. The loan is used for the company's business, and each shareholder must bear the corresponding share according to the proportion of shares. Unless you distribute the shares separately, the shareholders who can lend will occupy the corresponding proportion of the shares of the company according to the loan amount, but in that case, the other three shareholders will all suffer losses, so it is better to bear them together.