LEFT JOIN act_user_relation u ON i.ID = u.ACT_ID AND U.DEL_FLAG = '0' AND u.`STATUS` != 'refused' AND u.`STATUS` != 'canceled' AND u.USER_ID = #{userId}
LEFT JOIN (SELECT count(1) signupNum, re.ACT_ID from act_user_relation re WHERE re.DEL_FLAG = '0' AND re.`STATUS` != 'refused' AND re.`STATUS` != 'canceled' GROUP BY re.ACT_ID) c ON c.ACT_ID = i.ID