One of the major bike-sharing pioneers in China, Ofo, has received more than 10.13 million online applications for deposit refunds, as angry users besiege the company’s office in Beijing, The Paper reported.

Users paid 99 yuan or 199 yuan in deposits to use the shared-bikes. Based on the company’s large user base, the total scale of deposit refunds is between 1 and 2 billion yuan, the report said.

Meanwhile, several hundred customers lined up outside of Ofo’s office in Beijing demanding an immediate refund.

Recently, Ofo has been involved in serval lawsuits. Bike makers Shanghai Phoenix Bicycles and Tianjin Flying Pigeon Cycle Manufacturing as well as logistics services providers Best, Deppon Logistics and Kerry Logistics Shanghai branch are among the firms that have recently sued Ofo over unpaid bills.