Or, perhaps we should consider a different approach: Instead of limiting ourselves to parks or city streets, could we explore vacant land along the roads between villages in the suburbs?
I had already encountered similar situations while riding a motorcycle on village roads before. The vehicle could be parked safely at the intersection without obstructing traffic, which would allow for the installation of the stand. Traffic volume on the inter-village roads is very low; approximately 10 electric bikes and 1 car pass by in about 2 hours.
There aren't many villages like those in Huairou and Shunyi, located far from the district center. Specifically, Huairou might be able to take advantage of the elevation of the mountains. I haven't explored other districts as much, so I don't have a good sense of them.