Here's the answer:
“心”
(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 97.01% of the time!
(xīn)
Fun fact: the hundreds of thousands of people learning Chinese with Memrise get this phrase correct 97.01% of the time!