Earlier this year, photos showed hundreds of bikes dumped in huge piles on the streets in the southern city of Shenzen, prompting calls for tougher regulation.
In the eastern city of Hangzhou, thousands of bicycles that had been left chained up around the city were seized by police and dumped in a field.
The issue for Sharing E Umbrella, it turned out, was getting people to return the umbrellas. "Umbrellas are different from bicycles," he said.
"Bikes can be parked anywhere, but with an umbrella you need railings or a fence to hang it on."
More to the point, the platform doesn't charge users an unreturned umbrella fee, meaning most people simply ended up keeping them. Zhao said taking them home was "probably best" as they would at least be "safe".
Zhao said not only did he plan to replace the stolen umbrellas, which cost 60 yuan ($12.20) each, he planned to make 30 million of them available across the country by the end of the year.
Despite the questionable business model - which may struggle to bring in revenue outside of the rainy season, as news website Shanghaiist pointed out - Sharing E Umbrella has no fewer than 14 competitors.
Brellabox, a similar concept floated on the US version of Shark Tank last year, was described by businessman Kevin O'Leary as "maybe the worst idea I've ever heard".