he monthly 7Be monitoring results at 3 positions near Hangzhou are reported.The annual average 7Be concentration in the air above ground is 4.6±2.0mBq·m-3

about 50%-80% more than the value of UNSCEAR report. It reachs the amximum in October to December

the minimum in February and June to July

and approaches the mean value in April to May. These changes evidently relate to seasonal raining and do not follow UNSCEAR report

which indicates that the maximum occurs in spring and the minimum in late autumn caused by the subsidence from stratosphere.The 7Be radiation dose is also evaluated

which is much less than 222Rn and can be ignored.