巧事

tā zài tā mǔ qīn shēng rì nà tiān chū shēng zhēn shi qiǎo shì

他在他母亲生日那天出生，真是巧事。

It is a coincidence that he was born on his mother's birthday.

tā men wèi le zhè jiàn qiǎo shì ér dà xiào

他们为了这件巧事而大笑。

They had a hearty laugh over the accident.