Indian reusable launch vehicle proposal:
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Besides looking very much like a Tengyun space plane, isn't that engine just a Chinese TRRE engine?
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Are there any other TRRE engine projects going around outside of China?
Remarkably similar. But China doesn't need to turn its head. The Indian program for this decade ( till 2030) won't even have a mars landing program. Besides the Human spaceflight attempt ( by 2024 or 2025 if all things go well) and a moon lander reattempt ( maybe with Japan ? ), there isn't much happening this decade for India.
Also to note is India's attempts to break into and stay in the double digit launch rate. India has not launched more than 10 an year till now. Anyway, what i could understand from Indian defense forum is that there are multiple constraints ( funding being a big one).
India intends to do all things China does. There is a strong 'also me' tendency. But still, China has an almost two decade lead ( in first human spaceflight ). The resources to be thrown at the TSTO project may be too much for India ( the engineering challenges are another) of this decade. There is a chance that a small demonstrator with some key technologies be tested.