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Why Temple of Heaven staff use sponges to protect ancient floor bricks in the rain
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天坛保洁雨中用海绵吸水打扫地面，工作人员回复称保护古代金砖，金砖为啥如此特殊？有什么更好的办法清洁吗？
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Ranking history & source details
First recorded Aug 29, 2026, 8:26 AM CST · latest Sep 5, 2026, 8:23 PM CST. Ranks reflect attention on each platform.
| Day | Platform | Best rank | Last rank |
|---|---|---|---|
| 2026-09-05 | Zhihu Daily | #29 | #29 |
| 2026-09-04 | Zhihu Daily | #25 | #25 |
| 2026-09-03 | Zhihu Daily | #22 | #22 |
| 2026-09-02 | Zhihu Daily | #19 | #19 |
| 2026-09-01 | Zhihu Daily | #16 | #16 |
| 2026-08-31 | Zhihu Daily | #12 | #12 |
| 2026-08-30 | Zhihu Daily | #5 | #5 |
| 2026-08-29 | Zhihu Daily | #4 | #4 |