sentences:  The first pre-production test car based on the final Chevrolet Volt design was built in June 2009, in Warren, Michigan, and by October 2009, 80 Volts had been built and were tested under various conditions.During its first eight months in the Chinese market, the BYD F3DM PHEV-60 only sold less than 100 vehicles.Sales of the F3DM began in Hong Kong in June 2009.