Beijing time display
Live Beijing time · full-screen digital clock wall · milliseconds · 12/24-hour format
纯本地运行：本页不发起任何网络请求，所有显示都在你的浏览器里完成
字号与配色只存在你这台浏览器里，不会上传；想在另一台机器或另一个人那里得到同一个样子，
把地址栏里的 ?size=…&theme=… 一起发过去即可。这两项都只改显示，不影响时间口径。
显示口径：时间取自你设备的系统时钟，再按 Asia/Shanghai 时区换算为北京时间；
毫秒位是设备时钟的毫秒读数。本页不做网络校时——需要严格校时（溯源到标准时间）请用操作系统的 NTP 同步。
适合这些场景：会议室/机房挂屏、直播或录屏叠加时间、跨时区协作时对表、需要"北京时间全屏显示数字"的演示， 以及只想快速看一眼现在北京时间几点。
和「世界时间」页的分工：本页专注当前北京时间的大屏显示；需要多城市对照或跨时区换算（北京 12:00 是纽约几点、会议时间是否落在对方工作时间）， 用 World clock / time zones。
Related tools
FAQ
Is the Beijing time shown here accurate?
The time is read from your device's system clock and then converted to Beijing time using the Asia/Shanghai time zone, so accuracy depends on your device's clock. Second- and millisecond-level precision both rely on the device clock; for strict time sync use your operating system's NTP synchronization.
Why does the time shown differ from my phone's?
If your device is not in the +08:00 time zone, the page shows the offset between your device's zone and Beijing; your device's time may also simply not be auto-syncing. This page always displays Beijing time regardless of your device's time zone.
Does it support full screen?
Yes - click the 'Full screen' button. In full screen you can hide the seconds and the date and adjust the font size, which suits a desktop or a meeting-room big screen.
Does it sync the time over the network?
No. The page makes no network requests and uses no third-party time-sync service - everything is displayed inside your browser.
Are the milliseconds real milliseconds?
The millisecond digits come from the browser's timer reading (based on device time), shown to 3 decimal places; it is your device clock's millisecond reading, not a network-synced result.