The main Borneo part of Malaysia was Kuching (instead of Serian), Sibu (yes you are right), Bintulu & Miri. Serian was just beside Miri under Brunei.
The main Borneo part of Malaysia was Kuching (instead of Serian), Sibu (yes you are right), Bintulu & Miri. Serian was just beside Miri under Brunei.