If you included some Baijiu in that meal, you're well on your way to a first class everything in China.
Self-evaluations are hard sometimes, especially when you do try to be a good teacher but the students do
not respond in kind.
Seriously though, if YOU believe that your teaching methodologies need work please try to improve those first before sending out future dinner invitations. Investing on some kind ESL books that will teach you some things in the long run is cheaper; I bought four ESL books plus three manuals.
In China, mostly the education is crap and some of the teachers and administrators of the province that I work in know this. I personally work with some who admitted that Chinese education has alot of improvement to do. My jaw almost dropped to the floor when I heard this. In China, things change slowly but they do change. I want to see if in the next ten years Chinese education improves or continues its current path of degrees for sale.