Straightforward circumvention like that isn’t allowed (I’m not saying it won’t work). The new companies you mention would only be entitled to thelower tariffs on the value they add to the product they buy from China.
But how much visibility can the US government have into what happens between India and China? Especially if they work at hiding this stuff. I'm not saying it will work, I'm just curious. How can you tell how much of a product is made in India vs China if India and China work together to lie to you about it?
Regarding India, Indian govt already has huge tariffs and non tariff barriers on China. They imposed many of those during Galwan valley standoff and later extended them when they are promoting manufacturing or PLI for specific sectors. Indian govt and local Indian manufacturers won't allow middlemen to come and relabel items and eat in to their share of the pie. Sure, with the corrupted Indian bureaucracy some relabling will still go through, but it wont be much. Not sure how US plans to deal with relabling in Cambodia, Mexico etc. though.
