From: client@example.invalid
To: teaching@example.invalid
Subject: Clover teaching thread
Date: Tue, 13 Oct 2026 11:00:00 +0800
Message-ID: <M03@quickrouter.invalid>
In-Reply-To: <M02@quickrouter.invalid>
References: <M02@quickrouter.invalid>
MIME-Version: 1.0
Content-Type: text/plain; charset=utf-8

The attendee count is 24. This answers your question in M02.