Useful guide and I will try out the build. Some combos which people may want to try are listed below:
S3 -> S2 -> S1 is useful for ambushing. Using S1 before S3 is kinda weird cos S3 wants to land on the hero to knock them into the air while S1 deals more damage the closer the hero is to the edge. Using S2 while in the charge up for S1 allows you to deal damage during that time and also makes it easier to position the first skill due to the slow down before chasing with the enhanced basic attack and S2. You can also try using the ult when on low health to try and trigger the passive for spell vamp by circling or just to escape. However, remember that the activation of the ult leaves yu zhong vulnerable to attack.

These combos are just based off my play-style and others may not find these combos useful but tell me if they help.

he feels a lot like Roger

a big Roger, haha.

Yes. Tbh you can create your own combos depending on your playstyle. This is the best combo for this build which includes max lifesteal and use of passive. Do try it out. Hope you’ll get the result.

About his skills though, a useful combo is S1 -> S3 -> S2, because his S1 has a tiny charge-up, so it will proc when you land from S3, then your S2 will go into enhanced basic attack. TBH he feels a lot like Roger with a Chinese skin.