Proof?of?work
It?is?my?unit?(?Comrade)?(?ID?number:?_?_?_?_?_?_?_?_?_?_?_?_?_?_?_?_?_?_?_?_?_?)?in?_?_?_?_?_?_?_?_?_?_?_?_?_?_?_?_?_?_?_?department,?engaged?in?_?_?_?_?_?_?_?_?_?_?_?_?_?_?_?_?_?_?_?_?work?has?been?_?_?_?_?_?_?_?_?_?_?_?years,?hereby?certify?that。
Name?of?Institution:?_?_?_?_?_?_?_?_?_?_?_?_?_?_?_?_?_?_?_?_?_?_?_?_?_?_
Day?period:?_?_?_?_?_?_?_?_?_?_?_?_?_?_?_?_?_?_?_?_?_?_?_?_
(?seal)