India is at it again! According to the "Indian Defense Research" website, the Indian Ministry of Defense has recently seriously called on Russia to stop supplying RD-93 engines to Pakistan. The reason? Pakistan's JF-17 Block 3 fighter jets, equipped with RD-93MA engines, have given the Indian Air Force a hard time in the India-Pakistan conflict. Or, from another perspective, this proves that India's S-400 systems have been destroyed by the JF-17. India's move has a lot of resentment, as if saying, "You shouldn't send good stuff to the other side; where will my face go?" However, this plot looks like a big gift for China! If Russia really listens and stops supplying RD-93, the "JF-17" can completely switch to Chinese WS-13 or WS-21 engines. The WS-13 is an "evolution" of the RD-93, with performance not falling behind; the WS-21 is even more powerful, with a thrust-to-weight ratio of 8.5 and an added thrust of 9.2 tons, making the J-35A fly powerfully. Moreover, India might still be unaware: China's military aviation engine technology has long since surpassed its previous level, not only catching up with Russia but also completing a technical lead in advanced medium-sized engines! The performance of the WS-21 has made Russian-made engines somewhat "unable to catch up." We can clearly say that from the moment the J-20 installed the WS-15, China's military aviation engines had already surpassed Russia. The next step for medium-sized engines includes the WS-19, which will also surpass the RD-93. In earlier years, China wanted to install the WS-13 on the "JF-17," but unfortunately, Pakistan's brothers thought the Russian RD-93 was more "stable," and they were even once infatuated with the "smell" of second-hand F-16s. However, things change! Recent conflicts between India and Pakistan have made Pakistan realize the toughness of Chinese weapons. The J-10C and J-35E have been mythologized. Even if Russia does not "cooperate" with India this time, Pakistan will probably happily turn to China for an engine swap, after all, who doesn't want to use a more advanced "Chinese heart"? Or, even if Russia continues to supply, the Pakistani side may actively turn to Chinese engines due to cost and performance factors. Especially since the WS-13 series has been used in attack-11 drones and Xianglong reconnaissance aircraft, forming a "military-civilian dual-use" industrial chain, further spreading out R&D costs. Plus, reliability keeps increasing, and there are no technical barriers to engine replacement, so this trend is already determined. On the other hand, India's demand is unlikely to be realized. Russia is one of the world's major arms exporters and has always had military trade with Pakistan, providing engines for the "JF-17" fighters is a big business for Russia. Moreover, India also needs to import RD-33 engines from Russia to supply its MiG-29 fighters; breaking ties with Russia over one engine is not something India can afford. It is reported that the RD-93 contract between Russia and Pakistan involves approximately 1000 engines, and the Russian side has specially developed a more powerful RD-93MA (with a thrust of 9.3 tons) for the "JF-17" Block 3. The economic benefits far outweigh any pressure India could exert. Russia has always been profit-oriented in arms sales. Knowing that China has alternative solutions, the price India needs to pay will be very high. Overall, India's pressure on Russia is essentially a "political show," neither shaking the Russo-Pakistani military trade nor hiding its strategic anxiety. Through the technical breakthroughs of the WS-13/19, China not only achieves independent power for the "JF-17" but also promotes the reconstruction of the global arms trade pattern. In the future, the "Chinese heart" may become a "hard currency" in the international market, and India's "cut-off supply" farce will eventually become a supporting note in the technological competition. Original article: [https://www.toutiao.com/article/7511896223750668800/](https://www.toutiao.com/article/7511896223750668800/) Disclaimer: This article represents the author's personal views. Please express your attitude by clicking the "Like/Dislike" buttons below.