PANG TAO 庞涛 b.1934_Change of Color Gradation – Turquoise Tone I 色阶的变化—绿蓝调之一, 2017_Gouache and silk screening priting on paper 纸本水粉、丝网印刷_134 x 262 cm(52 3:4 x 99 1:4 in.)