Mr. Liao encountered a trouble thing after the Labor Day holiday, because his elevator brushes is not dense enough, could not prevent dust from entering the gaps of the elevator. Mr. Liao wanted to re-order a new brush to aseemble to elevator, but he did not know Elevator brushes which company is good, Mr. Liao search on the Internet, and found AOQUN is good, so he tried to call our AOQUN. &n...