HSK 7-9
基层
jīcéng名
basic level; grassroots unit; basement layer
年轻医生主动到基层服务。
Nián qīng yī shēng zhǔ dòng dào jī céng fú wù.
The young doctor volunteered to serve at the grassroots level.
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Appears across levels (7-9) in the HSK 3.0 word list.