  This paper reports site survey results for the Infrared System for the
Accurate Measurement of Solar Magnetic Field, especially in Saishiteng
Mountain, Qinghai, China. Since 2017, we have installed weather station,
spectrometer for precipitable water vapor (PWV) and S-DIMM and carried out
observation on weather elements, precipitable water vapor and daytime seeing
condition for more than one year in almost all candidates. At Mt. Saishiteng,
the median value of daytime precipitable water vapor is 5.25 mm and its median
value in winter season is 2.1 mm. The median value of Fried parameter of
daytime seeing observation at Saishiteng Mountain is 3.42 cm. Its solar direct
radiation data shows that solar average observable time is 446 minutes per day
and premium time is 401 minutes per day in August 2019.
