Not me. The many economists (not only FT) out there.
How much of that growth was due to real estate/infrastruture investment? And what has been the return of this investment? how much debt has been generated by it?
You need me to post evidence? ok. In order to achieve the growth target, the chinese government mandates government entities to make investments regardless of return, injecting liquidity to the economy in order to create investment, even if it means growing asset bubbles (like the real estate sector and associated sectors) , create implicit guarantees to private entities that "the national team" will always be there to safeguard them, even if it means maintaining zombie companies, etc.
See above.