Complex sentence: At the end of this testing, the People's Liberation Army Air Force purchased 24 S-70C-2s, equipped with more powerful GE T700-701A engines for improved high-altitude performance.
Split into simpler sentences: At the end of this testing, the People's Liberation Army Air Force purchased 24 S-70C-2s. These S-70C-2s equipped with more powerful GE T700-701A engines, for improved high-altitude performance.