《宋史·本纪·卷四》
初九。罢除昌州七井虚额盐。
甲子，罢昌州七井虚额盐。
On the 9th of the first month, the fictitious salt positions in the seven wells of Changzhou were abolished.
<s>[INST] Kindly elucidate the central themes in this passage in English: 甲子，罢昌州七井虚额盐。 [/INST] On the 9th of the first month, the fictitious salt positions in the seven wells of Changzhou were abolished.</s>
Kindly elucidate the central themes in this passage in English: 甲子，罢昌州七井虚额盐。
user
On the 9th of the first month, the fictitious salt positions in the seven wells of Changzhou were abolished.
assistant