The Tiangou hamlet is located in the 3rd to 6th alley of Meiyuan Village, Tai'an Township, Miaoli County, in the northeast of Da'an, and on the terrace on the right bank of the Da'an River. The Atayal people call it Saulau (or Vai-annuh, Mai-annuh), which means soil that can be dyed, sa means to dye, and ulau means land. It’s got the name because there are earth-colored, earth-yellow and red soils in the local area and were used as a source of dyeing pigments. It is also also called Vai-annuh, which means flat in the local Atayal language. The people originally lived in the Jinwei mountain area on the east side of the current location. During the Japanese occupation period, in the Taisho period, due to the implementation of the group relocation plan, they were moved to the current place to live. As the ridgeline looks like a crouchingdog and because of its high terrain, it was give the name, Tiangou. From the mid-1930s to 1937, some members of the Yehmagong comunity were moved to the Tiamgou settlement by the Japanese.
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