CIOE 2021 (The 23rd China International Optoelectronic Exposition), as the world’s leading optoelectronic exhibition, will be held at Shenzhen World Exhibition & Convention Center on September 1-3, 2021. GiAi welcome your visting our booth No:9A84 & 13B40 Main service :Fabricate your lenses ,optical filters,window glass,prism…