ask 8 teacher again, if my I-140 is turned down, I have to go back, is it most likely my future B2/1 visa will be appoved?
-Although it may be difficult due to immigreation intent, tt is still possible for you to get the B1/B2 visa because DS-160 does not ask whether you have apply for green card before.
Does I-140 mean I have immigration intent so they won't approve my any non-immigration visa?
how many % of chance on successful future B1/2 or
-Hard to say.
other non-immigration visa?
-Not affect H1/H4 or L1/L2 visa application.