(Scenario: A and B are old school friends, one day they ran into each other on the street. An invited B have dinner together.)
A: 我们一起去吃饭吧，我请客。(Wǒ men yì qǐ qù chī fàn ba, wǒ qǐng kè.) Let’s dine out together, I’ll take care of the bill.
B: 还是我来吧。(Hái shì wǒ lái ba.) I’ll pay for it.
A: 跟老同学还客气啊。(Gēn lǎo tóng xué hái kè qì a.) There’s no need for so much courtesy to your old classmate!)
B: 那好吧，下次我请。 (Nà hǎo ba, xià cì wǒ qǐng.) Ok, I’ll treat you next time.