Group 1 - The company Changfei Fiber Optic Cable Co., Ltd. has applied for a patent for a controllable azimuth anti-resonant hollow core fiber and its preparation method, published as CN119937083A, with an application date of February 2025 [1] - The patent involves a hollow core fiber structure that includes an outer cladding and an inner cladding, with nested structural units designed to reduce transmission loss in hollow core fibers [1] - The company has a registered capital of 75,790.5108 million RMB and has invested in 41 enterprises, participated in 2,742 bidding projects, and holds 1,672 patent information [2]