$BNB will receive corresponding rice warehouse vouchers as a receipt for this batch of rice. Then, he can decide at his discretion when to sell these rice warehouse vouchers. In fact, many daimyo are financially struggling, and they often advance the tax revenue from the next rice harvest (the donations and taxes collected by the daimyo are paid in the form of rice—usually, this rice accounts for 40%-60% of the farmers' harvest) by selling rice warehouse vouchers. In some cases, they may even pledge the entire rice harvest for several years in this way.