Original: To arouse students ' interest in Putonghua , the school offers Putonghua Day , Tongue-Twisters , Putonghua Class , Singing Contest , Putonghua Broadcast and Putonghua Corner .
Simplified: There are many activities such as Putonghua Day , Tongue-Twisters , Putonghua Class , Singing Contest , Putonghua Broadcast and Putonghua Corner .