Kakaretso Sebopeho Setso Sehlopha Melao Lipontšo Tse latelang li tla: Lefatše la laser bakeng sa Photonics 2022, Shanghai La 26-29 Mmesa, 2022 Liketsahalo tsa Nalane: Wuhan-Optics Valley ea China EXPO 2021 Shanghai-Laser World of Photonics 2021 Shengzhen-China International Optoelectronic Exposition 2021