China's second aircraft carrier — and first domestically built carrier — completed its initial sea trial last week. The carrier, referred to as Type 001A, left its port in the northeastern city of Dalian on May 13 and returned on May 18 after completing all of its assigned tasks. China launched Type 001A in April 2017, five years after commissioning its first carrier, the Liaoning, and expects to enter it into service later this year.