so you started in last July. you should know the h1 quota would be reduced back to 65k and you know it would be used up in just a few month. what were you doing in july and august? you must let the employer file 129 in the first month, or you quit and find another employer.
now you eithe go back to china, or you have to find an employer to file 129 june 1 because it cannot be filed more than 4 months b4 oct 1. you can stay but you cannot get paid after opt exp so you have work for free for 4 month till getting h1.