Here's the answer:
“公园在那里”
(gōngyuán zài nàlǐ)
Watch a real native speaker say it:
Here's how it sounds in a textbook:
You could also say:
- gōng yuán zài nà lǐ
- gōngyuánzàinàlǐ
Fun fact: the hundreds of thousands of people learning Chinese with Memrise get this phrase correct 96.61% of the time!
