北周武帝释放奴婢，既有人为因素，也有客观因素。

The cause that Emperor Wu of the Northern Zhou Dynasty released slaves was both human factor and objective factor.

youdao

北周武帝释放奴婢，既有人为因素，也有客观因素。

The cause that Emperor Wu of the Northern Zhou Dynasty released slaves was both human factor and objective factor.

youdao