Thank u for ur advices above, i'm so sorry to let u think that i ignored these, but for my poor foreign language, i could't get all the critiques understood.

I have knew that there was some mistakes with the perspective, but it's a huge work to modify all them for me. i drew these works only for pleasure in my short leisure time, so i would like to paint a new transformer rather than to edit the old. i like to make the  style identical, also include the mistakes.

ah, yep, these r not wip, but really thank all of u for the excellent suggestions and i will remember them when i drew with another series.=P