Usages of chá
先 查 天气预报。xiān chá tiānqìyùbào.
Check the weather forecast first.
我 在 网上 查 营地。wǒ zài wǎngshàng chá yíngdì.
I look up campsites online.
Elon.io is an online learning platform
We have an entire course teaching Chinese grammar and vocabulary.