Complex sentence: The People's Republic of China began development of the WS-15 in the 1990s, designed to produce a maximum 180 kN thrust with afterburner, similar to the Pratt & Whitney F119 and is expected to power future 5th-Generation fighters.
Split into simpler sentences: The People's Republic of China began development of the WS-15 in the 1990s. The WS-15 is designed to produce a maximum 180 kN thrust with afterburner, similar to the Pratt & Whitney F117 and is expected to power future fifth-generation fighters.