Chinese President Xi Jinping has sent a congratulatory letter to the Science and Technology Daily on the occasion of the 40th anniversary of its founding.
Using flotation, a relic salvage technique, researchers have recovered microscopic plant remains from historical sites in China. Foxtail millet traces dating to around 8,600 years ago were unearthed at the Xinglong Site in Hebei and the Simagou Site in Inner Mongolia in north China; 7,700-year-old broomcorn and foxtail millet remains were found at Hebei's Sitai Site and Inner Mongolia's Yumin Site.
