wèi
le
1
in order to
2
for the purpose of
3
so as to
为了不让父母担心,我决定不会一个人去旅行了。
So my parents wouldn't worry, I decided not to travel alone.
我现在这么努力赚钱,就是为了以后不用那么辛苦。
I'm struggling hard to make money now so that I don't have to work so hard later.
为了让你开心,他准备了一个惊喜给你。
In order to make you happy, he prepared a surprise for you.