stopwatch

Go all out to set another new record of high production and excellence!

Go all out to set another new record of high production and excellence! (1960, September)

Painstakingly concentrate your efforts and skilfully study your capability

Painstakingly concentrate your efforts and skilfully study your capability (1965, April)

Technological innovation makes red flowers blossom

Technological innovation makes red flowers blossom (1975, October)

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