开放日

wǒ hé mā ma jí ér zi yī qǐ cān guān le xué xiào de kāi fàng rì

我和妈妈及儿子一起参观了学校的开放日。

I visited the school open day with my mother and son.

gěi měi wèi jiā zhǎng fā chū le cān jiā kāi fàng rì de yāo qǐng

给每位家长发出了参加开放日的邀请。

Each parent was sent a personal invitation for the open day.