QQ不能给陌生人发红包，需要添加为好友后才能发红包。
给好友发红包的方法如下：
1、进入手机QQ后，点击下方的联系人。
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2、在联系人中选择要发送红包的好友。
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3、在好友页面中点击下方的发消息。
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4、点击输入框下方的红包图案。
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5、输入发红包的金额后，点击下方的塞钱即可将红包发给好友。
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