If you have nothing to do, you can do some electronic marketing in Sina Weibo, and send out some things you have made (not afraid of being copied) @ some car manufacturers for interaction.

you can also send some e-mails to some car manufacturers and deliver them repeatedly.

you'd better register what you think is better first to prevent others from stealing it. These days, shanzhai is fast. Don't let your heart beat Shui Piao.