Today’s Classifier: 張
一 張相 (yat jeung seung) (a sheet of photo.)
Flat, rectangular things have the classifier 張。Also things that in the past have been flat and rectangular, like a sofa, (used to be a bench) has kept 張, which has then led to all types of furniture taking this classifier。
Things that are flat and rectangular or even square, have of course also this classifier, like 一張信用卡 (yat jeung san yong ka) (one sheet of credit card), 一張卡片 (yat jeung ka pin) (One sheet of business card) and 一張一百蚊 (yat jeung yat baak man) (One sheet of 100 dollars.)
It’s also one of the most common surnames in the Chinese world. In HK it’s spelled “Cheung.”