Is electronic certificate a good business electronic certificate? This is equivalent to a cash coupon, which can be used as a cash deduction when shopping in the mall, but the mall does not have a phone bill recharge business. Credit card points of CCB can be exchanged for telephone charges. The face value is 10 yuan (6600 points), 20 yuan (1 1000 points), 50 yuan (28000 points) and 100 yuan (54000 points). If the landlord has a CCB credit card, he can exchange it on the CCB credit card integral mall.