[Optical fiber concept is active, Huamai Technology is hitting the daily limit] On November 11, the fiber optic concept was active, Huamai Technology was hitting the daily limit, and Changyingtong, Hengtong Optoelectronics, YOFC, and Tongding Internet followed suit. On the news, China recently completed the world's first 1,000-kilometer hollow-core optical fiber two-way real-time transmission verification. This means that China has made new breakthroughs in the key technical fields of new generation communication networks. This test achieved for the first time synchronous transmission of 64Tb/s signals in both directions on a 1,007.48-kilometer optical fiber line. The one-way transmission of a 1,000-kilometer signal only takes 3.43 milliseconds.