Is the Harbin Y-11 a fully indigenous Chinese design?
Though Harbin Aircraft Manufacturing Corporation (HAMC) said Y-11 is a fully indigenous design, no other direct evidences prove/reject what it says. However, some indirect evidence shall be considered:

1) Except Y11, the only brand new design from HAMC is Z15 in 2008(Coperation with Airbus), other designs from HAMC are either authorised production or modification from existed model.

2) Y11 was designed in the period of the Cultural Revolution. There is insufficient engineers and research process is often influenced by political movement. However, Y-11 started first flight 8 months after the requirement is issued.

Based on the evidences i dont think it is a fully indigenous Chinese design, as they dont have experience for fully indigenous design in such a short period.