In ancient China, night watchmen were responsible for maintaining order and safety, and they used rudimentary timekeeping devices to track the hours. Their primary tools included clepsydras, or water clocks, which measured time by the regulated flow of water, and incense sticks, which burned at a predictable rate. These methods allowed watchmen to perform their duties effectively in the absence of modern timekeeping technology. AI
RANK_REASON The item discusses historical timekeeping methods, not current AI developments.
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