I saw oil leaking from the driving shaft of passenger side, but not from the transmission part, very weird.
Can someone give me some advice?

 

Heh, what a coincidence.
I was changing my CVT fluid and doing and oil change when I noticed the same exact problem last Saturday. That led me here.
I did a little more research and I think its the half shaft bearing (PN: 91057-SR3-008).
If you're in the US you could buy it from a dealer through this link HONDA E-STORE
You can find it for less elsewhere, but I think I'm going to go through the dealer.

I found a write up, but it's on a prelude. However, the PN is the same, and the assembly looks pretty similar. I'm lucky enough that my friend has a proper car lift, some air tools, and a press, but the guy that did the write up looks like he caveman'd it and it does look doable (albeit a pain in the butt).
Prelude Intermediate Shaft Bearing Replacement

Hope this is somewhat useful.

 

I changed the bearing inside the midshaft on mine chasing a noise that it was actually a wheel bearing. That leak is just grease breaking down. You could just repack it with hi-temp wheel bearing grease and put new seals on it.