usually, we call personal bridge-crossing fund-raising as building redemption, and enterprise bridge-crossing fund-raising as enterprise bridge-crossing, both of which are fund-raising businesses, with similar operation processes, but different objects. Pay off the mortgage principal and interest of the seller's property, cancel the mortgage registration and redeem the first-hand certificate. The first-hand certificate is redeemed and the mortgage registration is cancelled, which is regarded as the completion of the foreclosure.