If both the fast loan and the mortgage are approved by CCB, and the repayment reputation of the fast loan is good, even conducive to the approval of the mortgage, then the fast loan is a credit loan and the mortgage is a mortgage loan (a kind of mortgage loan), and there is no conflict between them.
If the fast loan belongs to CCB and the mortgage belongs to other banks, then the mortgage issuing bank will check your personal credit record before giving you credit. As long as all credit behaviors including the fast loan do not produce bad credit records such as overdue, then the mortgage application will pass.