老 (lǎo) means “prefix used before the surname of a person or a numeral indicating the order of birth of the children in a family or to indicate affection or familiarity; old (of people); venerable (person); experienced; of long standing; always; all the time; of the past; very; outdated; (of meat etc) tough”. It is an HSK 3 Chinese character in the HSK 3.0 vocabulary.
老师好!
Lǎoshī hǎo!
Hello teacher!
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