Red river starts from the center of Yunnan and flowing from the northwest to southeast.

红河发源于云南省中部，由西北向东南奔流。

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Except five name, from songhua river are the jade, shandong zibo red silk inkstone etc, and it is also the center of collection investors.

除五大名砚外，来自松花江的玉石砚、山东淄博的红丝砚等，也是收藏投资人追捧的对象。

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