Hi Cheng, welcome to the forums. Can't answer for all schools here FF, but you'll often find all the usual stuff in WC. Arm Bar, Figure 4, Chicken Wing etc. I've been assured that WC can be used on the deck too, but I've yet to have that proved to me.
Hi, I've been training Wing Chun for just over 2 years, in our club locks and throws are applied occasionally through the process of trapping limps in sparring or in Chi sau etc. But as a rule we will punch / chain punch instead of applying locks as a prefered method of finishing a fight quickly.
with wing chun there main aim is to trap and punch and kick but i have read that styles like wing chun kune(kune just means boxing) applys chi na style wrist locking this style of locking is in a lot of kung fu based style may have been added by sombody who has took it from another style the learnt hope this is of help
From my own limited experience of WC, I'd say it is a system where you can find many situations to apply another system, be it striking or grappling, CMA, FMA or JMA.
