docs about using regular locks instead of async locks
非惯常环境指游客脱离日常生活圈后，进入一种不熟悉或不常接触的环境。在出境旅游中，这种陌生常体现在语言、货币、地理气候与制度环境的差异性上。
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TikTok, which claims to have 30 million monthly users in the UK and more than a billion worldwide, has faced scrutiny over its data protection practices.