China - Early Imperial. POST TANG: Unknown ruler, probably late 10th century, AE cash (2.47g), Zeno-288363 (this piece), Chinese tian zi jian hao // two symbols; known examples found in Kazakhstan (this piece), Kyrgyzstan, and Xinjiang, unpublished in the usual works, VF, RR. There are now 10 pieces filed on Zeno, all with either 2 or 3 symbols on the reverse.