whats the size of the book?

Trade paperback is 5x8, hardcover is 6x9. Spine width is not known for sure until book is formatted. Let me know if any other q''s...

could you please guarantee the payment

Yes,  I have changed it to committed. 

Is it possible for you to extend the deadline?

Yes,  how long? 

Please extend deadline ... about 7 days.

I thought you wanted China represented in your cover. This is too dark in my view.