Where to leave shared bike? Rules rolling into Shenzhen

China imposes some of the world's toughest driving restrictions for cars, and now the checks and controls are expanding to the bicycle-sharing industry.

Police in Shenzhen said over the weekend that they are considering restrictions on the use of shared bikes, especially during holidays, to prevent road congestion and public disorder.

Police said that about 520,000 bikes have been put on the streets in the city in the year since bike sharing began.