In fact, in history, we got the Chinook helicopter sent by our little brother from the south in 1975, but we didn't receive it.
Because of some reasons in this time and space, I don't know whether it was my little brother who didn't capture it, or whether it was captured and not given to us. It is unknown if it was given to others.
After the helicopter was acquired in history, people were organized to dismantle it, and then it could not be installed. It was placed in the museum behind.
It is quite difficult to design and manufacture inside, of course, it is nothing for the fringe at this stage.
On the one hand, Liu Hai has detailed drawings, on the other hand, Liu Hai has made Black Hawk helicopters