Chinese phrase
有空的话，请来参加〜！ yǒu kòng de huà qǐng lái cān jiā 〜
Meaning
Please come to ___ if you have time!
When to use it
Invites someone to attend an event if they are available. It is a friendly, polite form that leaves the choice open.
Example dialogue
这周六社区有文化节，你有空吗？ zhè zhōu liù shè qū yǒu wén huà jié nǐ yǒu kòng ma
The community is holding a cultural festival this Saturday. Do you have time?
有空的话，请来参加社区文化节！ yǒu kòng de huà qǐng lái cān jiā shè qū wén huà jié
If you have time, please come to the community cultural festival!