I'm from a property management company. The suppliers we manage don't pay electricity bills. His electricity meter is not from the power company. Can I turn off his electricity?

Not in principle, but his electricity meter is not from the power company. You can ask someone from the power company to handle it. If the merchant rents your shop, the electricity bill will be deducted from your property account, and you can cut off the electricity at any time. If the store is an individual, I suggest you cut off the power carefully, but if the merchant trips "accidentally", you can refuse to supply electricity without paying the electricity bill, you know.