Here's the answer:
“路上小心！”
(lù shang xiǎo-xīn!)
Watch a real native speaker say it:
Here's how it sounds in a textbook:
Fun fact: the hundreds of thousands of people learning Chinese with Memrise get this phrase correct 94.03% of the time!
(lù shang xiǎo-xīn!)
Fun fact: the hundreds of thousands of people learning Chinese with Memrise get this phrase correct 94.03% of the time!
