What you are referring to is who starting building them in first place - Ofcource Chinese did, what Nitin is referring is Now india Control these & will modify to its defense requirements.
This is not the first case either of India being assertive and taking over structure started by Chinese by builting its own over it.
Example - In Godra river - Chinese starting build a permanent structure next to river bed in India side of perceived LAC, That was at a very very crucial position, and we could lose a lot more land if left unchecked
What happened to that structure, Chinese were pushed away, and in a matter of a week or so, India built a massive fortified camp in that area, with direct line of sight from valleys from North & East from China side, from where they could being in vehicles etc in short notice..
View attachment 16603
Purple spot marks the spot
View attachment 16604
Direct access from Valley - Chinese Artillery & Armour in direct line of sight in North & East coming via narrow Valley..
More details can be found with Abhijit Iyer in this video