Huìyì chíxù le sān tiān, qíjiān tǎolùn le hěn duō wèntí.
The conference lasted three days, during which many issues were discussed.
Tips
usage
其间 means 'during that time' and refers back to a previously mentioned time period. Compare with 期间 (qījiān) which functions similarly but is more commonly used with a specific noun (春节期间, during Spring Festival).
