Yes.. We test the plane thoroughly before inducting it, that's why it wont be like Junk-10 (your words,not mine)
well our "high IQ" preteders have a policy of inducting before testing.
they don't want to be accused of copying the way the world does it.
they first manufacture... then, whatever they "managed" to manufacture is the Design. .... then they induct ... and then PLAAF does "live testing" if the plane is useful in anyway what-so-ever. .... then they hide their crashes .... revealed crashes are attributed to russian non-cooperation with engines.....
and before anyone outside china cares or questions about any remote suitability of junk-10 ..... they say junk-10 is "old technology".... talk about Junk-20.
then Junk-20 gets manufactured, first. .... "design" will follow once the manufacture is finished.