xi’an bright laser technologies co., ltd. (blt) founded in july, 2011, is an integrated solution provider for metal addictive manufacturing supplier in china. on july 22nd, 2019, blt was listed on the star market with stock code of 688333.sh. by the end of december 2022，the number of employees is about 1400, among which r&d staff takes the percentage of 30.23%. blt values a lot on r&d, the investment accounted for about 15% of operating income for three consecutive years.