Nine 1700yearold brick tombs have been discovered in northwest China’s Xinjiang. Experts say that they can   1   valuable clues for the research of exchanges(交换；交流) between the central Chinese government at that time and    ___2   Western Regions.
It is the    3   time ancient tombs with typical characteristics of China's main Han nationality have been found in the Uygur ethnic region(自治区)．
    4    from Beijing，Shanxi and Xinjiang concluded that the tombs were  ___5___ between the middle and late third century and fourth century.
The tombs were unearthed during the   6   of a road earlier this year in Kuqa county,740 km from Xinjiang's capital Urumqi and part of the   7   Qiuci State. Qiuci State，which   8   between the second century BC and 860 AD，was one of the 36 states in the Western Regions.
The tombs would help archaeologists with research into the political，economic and cultural   9    between the Central Plains government and states in the west，and on the cultural     10   of the Central Plains on the Western Regions.
Archaeologists from the Xinjiang institute have dug nine tombs since August 22，___11    bodies of more than 30 people，some ancient   12   and more than 60 pottery(陶器)jars. It is thought there are another three tombs to be    13   .
The people buried in the tombs were    14   either people from the western regions deeply influenced by the Han culture or the Han residents(居民)in the    ___15   .

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