邀请书 (yāo qǐng shū) — letter of invitation, invitation

Definition

Examples

• 我昨天收到了一封邀请书。
  Wǒ zuó tiān shōu dào le yì fēng yāo qǐng shū.
  I received an invitation letter yesterday.
• 他给每位来宾写了一封邀请书。
  Tā gěi měi wèi lái bīn xiě le yì fēng yāo qǐng shū.
  He wrote an invitation letter to each guest.
• 邀请书上写着会议的时间。
  yāo qǐng shū Shàng xiě zhe huì yì de shí jiān.
  The invitation letter states the time of the meeting.