SERVICE - 王子製藥 Contact Us. Head Office:NO. 168, KEYUN S. RD., HUWEI TOWNSHIP, YUNLIN COUNTY 632, TAIWAN (R.O.C.) TEL : 05-632-6310. FAX : 05-632-0538. Consumer Hotline:0800-296-777. Contact Us. Head Office:NO. 168, KEYUN S. RD., HUWEI TOWNSHIP, YUNLIN COUNTY 632, TAIWAN (R.O.C.) TEL : 05-632-6310. FAX : 05-632-0538. Consumer Hotline:0800-296-777.