China Southern Airlines, based in Guangzhou, is Asia’s largest airline in terms of fleet size and the number of passengers carried. It has 400 aircraft and flies to 193 domestic and international destinations. In the U.S., the airline flies to Los Angeles, New York and San Francisco.

Air China, based out of Beijing Capital International Airport, is one of the largest airlines in China. The carrier flies to nearly 180 domestic and international destinations, including the following U.S. cities: Honolulu, Houston, Los Angeles, New York, San Francisco and Washington, D.C.

In our series on points and miles terminology, you’ve learned about the lingo used by airlines, frequent flyer programs and for award bookings. Here are the words you need to know to maximize your points and miles earning through credit cards.

The US Airways Companion Ticket is a great perk of the US Airways Premier World MasterCard issued by Barclays. Cardholders get the companion certificate after every card anniversary as an incentive to keep the account open. This perk will be discontinued in 2015 due to the carriers merger with American Airlines, but the merged airline is expected to offer a similar benefit when that happens.