天字第一號
tiān​zì​dì​yī​hào

number one

Senses

天字第一号/ 天字第一號 tiān​zì​dì​yī​hào (also tiān​zì​dì​yí​hào) number one

The largest, highest-ranking, or most significant; formerly used in reference to the first character of the Thousand-Character Classic 千字文 qiān​zì​wén being used as a numbering system.

References

variant 天字第一号/天字第一號 → 天字号/天字號
same_as 天字号/天字號 → 天字第一号/天字第一號