NIO (SGX:NIO, HKG:9866) delivered 31,138 vehicles in December, up 73% from a year earlier, according to a Wednesday filing on the Hong Kong bourse.

The Chinese automaker's year-to-date deliveries were up by about 39% to 221,970 vehicles.

Cumulative deliveries of NIO vehicles reached 671,564 by the end of December.

NIO's shares were marginally up in Singapore, but fell slightly in Hong Kong in recent trading.