  The discovery of two Laozi silk manuscripts at Mawangdui, near Changsha, Hunan province in 1973 marks an important milestone in modern Laozi research. The manuscripts, identified simply as “A” (jia) and “B” (yi), were found in a tomb that was sealed in 168 B.C.E. The texts themselves can be dated earlier, the “A” manuscript being the older of the two, copied in all likelihood before 195 B.C.E. (see Lau 1982, Boltz 1984, and Henricks 1989). A documentary on the Mawangdui find was aired on Chinese CCTV-10 in June 2010, which can be viewed from its website. The Hunan Provincial Museum website also provides useful information.