Discuz! Database Error

(1267) Illegal mix of collations (gbk_chinese_ci,IMPLICIT) and (utf8_general_ci,COERCIBLE) for operation 'like'

SELECT t.tid, t.closed, t.author, t.authorid FROM forum_thread t WHERE t.fid IN ('143','138','10','141','9','129','128','2','43','127','123','12','13','21','85','118','89','80','67','3','1','72','113','140','95','134','96','122','124','130','131','117','16','26','27','7') AND t.displayorder>='0' AND (0 OR t.subject LIKE '%活动%') ORDER BY tid DESC LIMIT 500

PHP Debug

No.	File	Line	Code
1	search.php	53	require(%s)
2	source/module/search/search_forum.php	418	discuz_database::query(%s)
3	source/class/discuz/discuz_database.php	136	db_driver_mysql->query(%s, false, false)
4	source/class/db/db_driver_mysql.php	153	db_driver_mysql->halt(%s, %d, %s)
5	source/class/db/db_driver_mysql.php	224	break()