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From: Eli Zaretskii <eliz@gnu.org>
Newsgroups: gmane.emacs.devel
Subject: Re: Design decision of string in Emacs
Date: Wed, 16 Dec 2020 18:16:52 +0200
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To: Zhu Zihao <all_but_last@163.com>
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In-Reply-To: <86h7olyjw7.fsf@163.com> (message from Zhu Zihao on Wed, 16 Dec
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> From: Zhu Zihao <all_but_last@163.com>
> Date: Wed, 16 Dec 2020 21:12:41 +0800
> 
> (string-bytes (concat (symbol-name 'GET) (encode-coding-string "我" 'utf-8)))
> ;; => 9

To avoid confusion like this, always encode _last_:

 (string-bytes (encode-coding-string (concat (symbol-name 'GET) "我") 'utf-8))
   => 6