[MENTION=257436]atourgates[/MENTION] Air China PhoenixMiles Gold (=Star Alliance Gold) requires 80,000km (= around 50,000 miles) in 12 months. It seems that your family member would attain Star Alliance Gold. His/her Gold membership would last 24 months.

Edit: I think you should double check the calculation made by WhereToCredit. Although it says '53,489 miles' for Air China, you should double check if it is km or miles.