I just listened to a good 2-part summary of the work of Joseph Needham from the China History Podcast: part 1, part 2.
His mammoth book describes the many scientific and engineering achievements of China, from the four great inventions to the stirrup!
Finally managed a bit of calligraphy practice. I enjoyed this seal script. This phrase says A Dragon leaping at the Gate of Heaven, a Tiger crouching at the Phoenix Tower. It was used by Emperor Wu of Liang to describe the skill of the acknowledged Sage of Calligraphy, Wang Xizhi.