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）