If you ever visit or teach in China, knowing the characters for Male and Female can be very helpful. On your school roster, It’s often very hard to know if the student’s name is for a Boy or girl. So most roster’s tell you – Male or female. It also helps if you Don’t want to enter the wrong Bathroom by accident. They don’t tell you in English 😛
男 = Nan (2) = Male
女 = Nv (3) = Female
Deceptively Blonde 
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