氣Chronology

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500580600740800900970100011001200141015401600176018001900 520–579680–739750–799840–899910–9691010–10991290–14091420–15391700–1759

1

1

2

1

1

1

1

2

2

2

1

1

1

1

2

1

1

2

1

1

2

1

1

1

1

10 +4

1

2

2

2

6

161 +155

45 +39

1

8 +2

2

23 +17

182 +176

1

8 +2

13 +7

11 +5

15 +9

2

7 +1

3

3

4

No year recorded 768

+762

Each crop stands at the decade of the first year its book's date gives; a date given only as before a year stands at that year. Dates come from the catalogues and editions cited with each record. The bars draw the whole span and their counts to scale; in the strip below them, fifty years or more with no crop are folded and marked. Japanese dates converted with HuTime ↗