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What does it mean to send a text message to show that the other party has received it?

The other party has received the SMS, and the other party has turned on the SMS reading receipt function.

1. According to Zhongguancun Online, the other party has received the SMS: after sending the SMS, the other party's mobile phone receives the SMS and gives a receipt, indicating that the sent information has been successfully delivered to the other party's mobile phone.

2. The other party has opened the SMS reading receipt function: some mobile phones or SMS applications support the SMS reading receipt function. When this function is enabled, the other party will receive a receipt notice.