not really,
WS-10 is a hybird to begine with```its Chinese engineering architect with
American core, Russian control system, and AL-31 style low pressure bypass stage ```
well, they wanted everything to be indigenous, however they realized that we were much behind the U.S and Russia in heavy turbofan engine techs, so in order to speed up the project, they draw on the experiences of the U.S and Russia's```
and that is the major reason that WS-10 project was sucessfully finished in 2005, but takes so long to upgrade and improve, as many problems occured when in service (as happened to any U.S or Russia's engines too) , and because of it is kind a mix mash, so solving a problem
often became like to
make a new start, or
start it all over again (before to make improvements and adjustment, you need datas for the part or few parts that you plan to work on, and because its a mix mash of American, Chinese, Russian standards, so you can imagine the difficulties of accquire them! )````
Luckily, with the finalization of
WS-10B and WS-10IPE, then the problem is effectively solved```sometimes we ridicule them by saying "We are so prould of them that they can actually manage to squish 3 different systems and school of thoughts into one and to make a working engine```"
btw, WS-15 is the first high performance heavy thrust turbofan engine that we actually started of from scratch```
2025 if I am optimistic````WS-19 would be probably quicker than WS-15
JH-20 is delta wing design with LERX, F-16 XL has crank delta wing design,b a wholly different plan-form design take a look @Cookie Monster 
