The Geographical location of Yangbajing is suitable for the direct detectio
n of the solar flare neutron events. The Yangbajing neutron telescope (NT)
and Neutron Monitor (NM) were established in 1998 October to provide the ob
servation of solar neutrons during the 23rd solar cycle. An unusual large e
nhancement of the NT and NM count rates over background was observed from 0
5:38 UT to 05:40 UT at Yangbajing on 1998 November 28.