Ụlọ ọrụ Guangdong Hecin Scientific, Inc. Adreesị 4F, Building1, #1 Ruifa Rd, Luogang District, Guangzhou City, Guangdong Province, 510530, PRChina E-mail hecin@hecin-scientific.com Ekwentị (86) 20-82512529 Oge awa 8.30 ụtụtụ ruo 5.30 mgbede Monday ruo Friday Chọrọ ịrụ ọrụ na anyị? KPỌTỤRỤ ANYỊ