《宋史·本纪·卷三十八》
二月初七，诏令寻求通晓历法的人。十一日，开资善堂。
二月戊子，诏求明历之士，壬辰，开资善堂。
On the seventh day of the second month, an edict was issued to seek people who were proficient in the calendar. On the eleventh day, the Cishan Hall was opened.