微信回应“撤回限时2分钟”
为什么撤回是2分钟?
WeChat explained why there is a 2‑minute recall window for messages: within two minutes of sending, the recipient most likely hasn't finished reading the message. Recalling at this point is like saying, "Let me rephrase," without disrupting the conversation.
If there were no time limit, senders could manipulate chat history, for example, by deleting loan records, work assignments, or business commitments, thereby undermining trust and accountability.
For text, voice messages, stickers, images, videos, official account links, video channel links, and mini-program cards, users have only two minutes to recall a message after sending it.
For files such as Word documents, Excel spreadsheets, PowerPoint presentations, PDFs, MP3 audio files, and compressed folders, the recall window is extended to three hours.
Viewing files naturally takes time. A recipient may be in a meeting or commuting – by the time they download and read, half an hour could pass. Three hours gives a meaningful buffer.
As for why WeChat shows a recall reminder after users recall a message, the app explains that if messages could vanish without a trace, it would be impossible to know what was sent, leading to endless disputes. The reminder ensures accountability.
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