质 Strokes Write it Listen 质 zhì essence, nature; material, substance HSK 4 8 strokes Radical 厂 Sound + meaning 21 words Built from厂chǎngcliff; factory, workshop; building十soundshíten, tenth; complete; perfect贝meaningbèisea shell; money, currency How it works贝 hints at the meaning (shell), and 十 shí hints at the sound.