Illustrated book

The image shows an open book with two pages. The left page contains a black technical drawing on a piece of off-white paper, appearing to show measurements and a floor plan. The right page contains black handwritten text written in a foreign language, likely Chinese or Japanese characters. The pages are rectangular, with a black line border around the edge of both pages. The book appears to be old, with discoloration on the pages. The background behind the book is white. The book appears to be an illustrated book by an unknown artist.