lfmao everyone who says there is no ground fighting in wing chun is ignorant.
that is like saying there is no ground fighting in karate or there are no strikes in judo lmfao.
wing chun ground fighting is pretty good but chances are you won't be able to find a chunner who can grapple because 99% of them neglect it much like %99 percent of karateka do to and how judoka neglect striking even though it is part of their style.
Pay attention to your Taolu!!!!!!!!
On the ground you do what you do standing up just slightly different.
Now your centre line runs vertically from the ground up still which can be confusing lol but your chin na basically remains the same but your fajing is limited and you will have to rely more on your movements from chum kiu & biu jee.
I wrestled for 10 years, had a jr blue belt 2nd kyu in judo when I graduated high school and decided to take up wing chun and got a serious lesson in grappling from a kung fu man who only ever trained wing chun.
You will learn a lot about wing chun however by practicing with judoka, jujutsuka, bjjers & wrestlers as they will tend to have you on the ground a lot.
Also you should ask your sifu about wing chun ground fighting as he might have some info for you.
here is a book called bunkai jutsu and it is all about hidden applications in forms you should give it a check if you are already in wing chun.