Many of these arrangements are used in shops or restaurants particularly new ones. This is one of the best arrangements of this type that I have seen.
We visited Old Shanghai Town which is beside Yu Gardens in the old part of Shanghai - there are many tourists and locals who shop in this vicinity, but we were "off the beaten track" in the back streets behind the Dragon Gate Mall, where these arrangements were sitting on the street outside the florist shop.
There are many many florists in China - quite surprising really!