Even though the manual mentions a power brick, my model came without one. Even powered only by the PS/2 connectors, the sound is unbelievable.
消费券是真金白银的补贴，也是拉动需求的有效工具。不过，消费券能降低游客的旅游成本，却无法自动兑换成为游客的满意指数。要想把消费券带来的短期流量转化为长期留量，关键不只是券发得多少，还在于文旅的内功练得有多深。
，这一点在旺商聊官方下载中也有详细论述
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https://doc.qt.io/qt-6/qtwidgets-index.html