Hawk based kat Labuan, sah2 la depa yang paling cepat boleh buat Alert 3 atau Alert 5

takkan nak tunggu dari Gong Kedak dulu

that is already a given due to the engine tech. same for FA-50.
China is indeed building an EMALS for their latest carrier but not sure how efficently it works compared to US EMALS.
Har? Who do you see taking the lead from SK?
Depends

it's true that majority of parts will be assembled, however SK electronics may be lots more advanced than we think, Samsung has come a long way from where it used to be
WZ-20 can look like a Blackhawk but whether it performs like a Blackhawk is a whole nother story. just like how a UH-60A can look like a Blackhawk, but is way different from a UH-60M.

Reverse engineering only takes you so far. especially now where material science is a huge part of the tech ability.

so whether they actually did "copy quite good", is a real question. see for example early Chinese copies of jet engines.