Set of 2 chinese watercolor painting technique books

Sellling a set of 2 comprehensive art tutorial books on Watercolor Painting Techniques:"Watercolor Painting Techniques" (水彩技法诀窍) – Focuses on modern watercolor methods, color mixing, and step-by-step guidance. Published by Tsinghua / Beijing Jiaotong University Press. "Painting Flowers with Watercolor Techniques" (用水彩技法画花卉) – Detailed tutorial on botanical illustration and flower painting by German artist Eckhard Hoffmann. Published by Shanghai Calligraphy and Painting Publishing House. Language: Chinese (with clear step-by-step visual illustrations, very easy to follow even without knowing the language)