the so-called Sino-Afro blue ![ab422e4b24a4d68b912b3f9836fc0881.jpg](https://w.iiii.ca/img/ab422e4b24a4d68b912b3f9836fc0881.jpg) ![43f88e1e8551df1bfc8a77b3270180c2.jpg](https://w.iiii.ca/img/43f88e1e8551df1bfc8a77b3270180c2.jpg) ![2c2d792fb854bbf013553f99bca7c3d2.jpg](https://w.iiii.ca/img/2c2d792fb854bbf013553f99bca7c3d2.jpg)