Take Air China Companion Mileage as an example, the mileage conversion ratio is 20: 1, that is, 20 points are converted into 1 mileage, and the basic unit of conversion is 2000 mileage or its integer multiple. This is equivalent to 40,000 points for 2,000 miles. Daily limit 1 order, annual limit 150 order. When redeeming air miles, you should first become a frequent flyer member of the airline, and provide the corresponding membership card number when applying for redemption. The processing time for air mileage redemption is about 10 days (the processing time for weekends, New Year's Day, Spring Festival, May Day, Eleventh and other holidays will be extended accordingly).