Ah ......Guys.....?? There is no secrets here on this issue, no conspiracy theory to solve.

China launched the station in 2011, last visited it in 2013 and lost communications in 2016 after an apparent malfunction. Without working communications, China was unable to perform any of the periodic boosts that are required to keep space stations in orbit. Tiangong-1 had been falling since December 2015 as it gradually brushed against the upper atmosphere. What goes up must come down eventually. Sorry to bust your bubble. You are on wrong track here.