《宋史·列传·卷一百三十三》
赵开善长心计，自罢检详官后，任成都路转运判官，于是奏请罢免宣和六年所增上供认额纲布十万匹，减免下户输纳利州水脚钱的十分之三，又减免蒲江六所盐井在元符到宣和时所增加的盐额，排列其顺序，叫作 鼠尾账 ，揭榜告示乡户所应当交纳的赋税的实际数目，使人人都能知道了解，乡村胥吏不得隐匿转寄。
开善心计，自检详罢，除成都路转运判官，遂奏罢宣和六年所增上供认额纲布十万匹，减绵州下户支移利州水脚钱十分之三，又减蒲江六井元符至宣和所增盐额，列其次第，谓之 鼠尾帐 ，揭示乡户岁时所当输折科等实数，俾人人具晓，乡胥不得隐匿窜寄。
Zhao Kai was good at calculation. After the abolishment of the inspector office, he served as a judge of the transfer and transportation in the Chengdu region. Therefore, he presented a report to cancel the increase of the tribute in the sixth year of the Xu’an era. The amount of linen was more than 100,000 pieces. It cut down the 30 percents of the downstream households to pay for the water transportation fee of the Lishui section. He also cut down the additional salt quota of the six salt wells in the Pujiang region during the Yuanfu to Xu’an period. He listed the order and called it the “mouse tail account”, posting a notice to show the specific amount of the taxes the farmers needed to hand in. In this way, the farmers were clear about it. The village clerks could not conceal and transfer.
<s>[INST] Identify the key themes in this Classical Chinese text and explain them in English: 开善心计，自检详罢，除成都路转运判官，遂奏罢宣和六年所增上供认额纲布十万匹，减绵州下户支移利州水脚钱十分之三，又减蒲江六井元符至宣和所增盐额，列其次第，谓之 鼠尾帐 ，揭示乡户岁时所当输折科等实数，俾人人具晓，乡胥不得隐匿窜寄。 [/INST] Zhao Kai was good at calculation. After the abolishment of the inspector office, he served as a judge of the transfer and transportation in the Chengdu region. Therefore, he presented a report to cancel the increase of the tribute in the sixth year of the Xu’an era. The amount of linen was more than 100,000 pieces. It cut down the 30 percents of the downstream households to pay for the water transportation fee of the Lishui section. He also cut down the additional salt quota of the six salt wells in the Pujiang region during the Yuanfu to Xu’an period. He listed the order and called it the “mouse tail account”, posting a notice to show the specific amount of the taxes the farmers needed to hand in. In this way, the farmers were clear about it. The village clerks could not conceal and transfer.</s>
Identify the key themes in this Classical Chinese text and explain them in English: 开善心计，自检详罢，除成都路转运判官，遂奏罢宣和六年所增上供认额纲布十万匹，减绵州下户支移利州水脚钱十分之三，又减蒲江六井元符至宣和所增盐额，列其次第，谓之 鼠尾帐 ，揭示乡户岁时所当输折科等实数，俾人人具晓，乡胥不得隐匿窜寄。
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Zhao Kai was good at calculation. After the abolishment of the inspector office, he served as a judge of the transfer and transportation in the Chengdu region. Therefore, he presented a report to cancel the increase of the tribute in the sixth year of the Xu’an era. The amount of linen was more than 100,000 pieces. It cut down the 30 percents of the downstream households to pay for the water transportation fee of the Lishui section. He also cut down the additional salt quota of the six salt wells in the Pujiang region during the Yuanfu to Xu’an period. He listed the order and called it the “mouse tail account”, posting a notice to show the specific amount of the taxes the farmers needed to hand in. In this way, the farmers were clear about it. The village clerks could not conceal and transfer.
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