践约

lái cǐ jiàn yuē

来此践约

come keeping an appointment

tā jiàn yuē zhǔn shí lái dào xué yuàn

他践约准时来到学院。

He kept his promise and came to our university at the scheduled time.

tā men méi néng jiàn yuē lì jí hái qián

他们没能践约立即还钱。

They failed to fulfil their promise to repay the debt promptly.

nǐ de yāo qǐng wǒ xīn lǐng le gǎn xiè shèng yì gǎi rì yī dìng jiàn yuē

你的邀请我心领了，感谢盛意改日一定践约。

Thanks for the invitation, but I'll have to take a rain-check on it.