China has recently completed the world's first bidirectional real-time transmission verification over a thousand-kilometer hollow-core optical fiber, marking a new breakthrough in key technologies for next-generation communication networks. According to technical personnel, the test—conducted on a 1,007.48-kilometer optical fiber line—achieved simultaneous bidirectional transmission of 64 Tb/s signals in each direction for the first time. This is equivalent to supporting the upload and download of 160 4K movies per second (each calculated at 50 GB). A one-way signal transmission over a thousand kilometers takes only 3.43 milliseconds, setting a new record for real-time transmission distance over hollow-core optical fiber. Compared with the best-performing solid-core optical fiber currently available, this technology increases transmission capacity by one fold and transmission distance by 60%. Compared with similar hollow-core optical fiber transmission tests, the verification distance is increased by 50 times.