Get the membership mileage of each airline. Credit card points redemption mileage is an advanced way to redeem the value of credit card points, which mainly refers to airline membership mileage (points). The redemption rules are 1 km for every 25 credit card points, and 1 redemption unit for every 500 miles (i.e. 12500 credit card points). In two calendar years, Air China bosom friend members will be eligible for the first redemption if they fly four flight segments (the flights actually carried by Air China) or the accumulated flight mileage reaches 20,000 kilometers.