This is a gray area of the rules and a matter of luck as to how the issuing airline interprets it. Years ago I tried to do this and at that time the routing was refused; the intra-Asia segment uses up the continent. Which would defeat your purpose. I doubt you can get an answer to this ahead of time, it is entirely up to the rate desk at the time of ticket issue (and also at the time of any re-issue, fwiw). Definitely a high-risk routing.