三年青春九年义务
[sān nián qīng chūn jiŭ nián yì wù]
San Nian Qing Chun Jiu Nian Yi Wu translates to 'Three Years Youth And Nine-Year Compulsory Duty'. It's likely referring to compulsory education years, suggesting youth dedicated to studying, highlighting a stage in life defined by learning responsibilities while experiencing young adulthood.