Mandarin Minutes

The primary number two is

èr   二   two 

and for counting things (including the time) Mandarin speakers say:

liǎng = 两 = two

So there are two “twos”~!

For example:

liǎng diǎn = 两点 = two o’clock

liǎng gè rén = 两个人 = two people

An exception is with “two hundred”, where either form is ok:

liǎng bǎi = 两百 = two hundred

èr bǎi =  二百 =  two hundred

See here for more info on “Hundreds“