How do you differentiate 口 and 囗 in handwritten hanzi?
As you see, the smaller rectangle is kou and the bigger one is wei. It is easy to differentiate using computer, but what about handwriting?

Question

Answer

口味，the kou is a stand-alone word , in the word wei, kou is just a part of the word.you know we taste something with our mouth,so in the word wei have a kou

Answer

囗 wei 今只作偏旁  不獨用   故並無此困擾