A4 Global Contact:

E-mail:info@a4tech.com.cn

Tel: +86 (769) 8209-7855

Dongguan, China 5-Link Technology Co.,ltd. Xiwang Industrial District, Tiantangwei, Fenggang Town,Dongguan City, Guangdong, China

USA Contact:

E-mail:info-usa@a4tech.com

Tel: +1 (909) 628-8858

Chino, California (For North America Inquiries only)

A4 Taiwan Office:

E-mail:info@a4tech.com.cn

Tel: +886-2-2218-4952

New Taipei, Taiwan PERFECT BEST ASSET MANAGEMENT INC. 25F-2, NO.111, Min-Chuan Rd., Hsin-Tien City,Taipei County 231, Taiwan(R..O.C.)