Will the last read receipt of iMessage disappear without reading it?

IMessage didn't read the latest news, and the read receipt won't disappear.

IMessage is an instant messaging software launched by Apple, which can send short messages, videos and so on. , with good security. Different from the SMS and MMS services of operators, users only need the data support of WiFi or cellular data network to complete communication. When sending a message to one person alone or to several friends at the same time, you can attach your favorite photos, videos or links. The more people there are, the more information they receive. Every message that iMessage sends over WLAN is free. IMessage can tell the user whether the information has been delivered, and if the receiver enables the read receipt, he can also see the receipt message that the information has been read.