There were some others such as guardsmen,postmen,handicraftsmen,the poor scholars who left their native place to study,and some returned peasants who had lost their land after escaped from their hometown,who were systemized to open up wasteland,grow food grain and pay xian-mi tax while remitted some other taxes and labors.

The layer spacing was not increased after the annealing at 150 ℃ for 3 h and the reason was explained in the light of molecular structure of PMSQ synthesized in and out of the nano-confined environment.