I actually like the gray sweater vest over the darker blue shirt, but the other ensemble is a bit less striking and thus less RTMI.

I didn't think that the freeze-on-the-spot gun belonged to SID? In fact, I don't remember a gun at all--I'll have to rewatch. I had thought that was a dark-energy trap that Zhu Jiu had left to hamper Shen Wei's movements.
Next episode, we will see Zhao Yunlan use it to freeze Shen Wei in place. Either Zhao Yunlan very temporarily developed Dixing powers and no-one saw anything wrong with that, or he has a freeze gun thingy. (Shen Wei could break out of the shackles himself, but that'd out him as Dixingren.)