Dockless shared bikes are convenient — until there are too many of them. 

Beijing’s government cleared over 388,000 shared bikes from its streets in the first half of 2019, saying they damage the city’s appearance and obstruct traffic, according to a report from the municipal transport commission.

The report comes as China’s bike-sharing market slows down and industry players struggle under mounting debt, leaving piles of poorly-maintained shared bikes rusting across the country.

Beijing has capped the number of shared bikes allowed in the city at 1.91 million — but that’s still too many for the capital’s already-crowded streets. Companies are assigned bike quotas that can be reduced as punishment if operators fail to comply with regulations. 

Hellobike, for instance, was fined 100,000 yuan by Beijing authorities for circulating more bikes than the limit, according to the report. Didi Bike, also known as Qingju, was fined 50,000 yuan for a similar offense.

Beijing residents complete an average of 1.6 million shared bike trips each day, with the average bike being used only 1.1 times per day, the report shows. Only 16% of all available shared bikes are actively used daily and 30% monthly. 

City regulators have told bikeshare operators to claim the bikes from storage and recycle them by the end of 2019. 

Related: Bike-Sharing Woes Put Skids on Suppliers’ Earnings