classifier for long thin things (rivers, cracks etc), barriers (walls, doors etc), questions (in an exam etc), commands, courses in a meal, steps in a process
province (of Korea or Japan)
channel
method
doctrine
teachings
這個
ze2 go3
this one
是
si6
is
什麼
sam6 mo1
what
Learn Stroke Order
See how to write "知不知" with stroke-by-stroke animation