China may try to use aspects of the S-400 surface-to-air missile (SAM) system it began receiving from Russia in 2018 to reverse-engineer capabilities it lacks, the Pentagon said in a recent report on Wednesday.

China in 2020 fielded its first missile with a hypersonic glide vehicle and advanced its scramjet engine development, which has applications in hypersonic cruise missiles, the Pentagon said in its report titled Military and Security Development Involving the People’s Republic of China, 2021.