Changsha Railway No.1 High School, founded in 1958 and managed by the Changsha Municipal Government since 2004, is a key provincial demonstration high school in Hunan. It is recognized for its strong traditions in sports, football, basketball, and cheerleading, as well as its role as a teacher training base.
The school occupies 44.2 acres with a total building area of 31,653 m². Currently, it serves 2,764 students across 57 classes (27 junior high and 30 senior high) with 232 faculty members, including senior and special-grade teachers and many with advanced degrees. It is known for excellence in teacher quality competitions and education standards.
As a provincial-level standardized exam center hosting over 50 national standard exam rooms annually—serving tens of thousands of examinees—the school faced critical challenges with its outdated clock system:
Significant time discrepancies: Exam rooms experienced 3 to 5-minute synchronization errors, violating exam timing requirements.
Inefficient manual calibration: Clock inspections and adjustments consumed over 2 hours per cycle.
Lack of unified time source: No centralized master clock to enforce strict synchronization under the Ministry of Education’s sub-0.5 second error standard for national exams.
No fault alerts: Risk of timing failures without early warning during critical exams.
A fully networked master-slave clock system was deployed, consisting of:
One GPS/BeiDou dual-mode time server (master clock): Provides a high-precision, redundant satellite time source with automatic switching between BeiDou and GPS signals.
Fifty-two high-brightness LED digital slave clocks: Installed across all exam rooms, synchronizing via NTP protocol for millisecond-level accuracy.
Dual power supply backup: Clocks powered by PoE (Power over Ethernet) and 220V mains power to ensure uninterrupted operation.
Complete exam room coverage: All 52 exam rooms achieved time synchronization accuracy within 0.3 seconds.
Improved maintenance efficiency: Remote monitoring and management reduced manual inspection time by 80%.
Zero faults during critical exams: Successfully supported 12 national-level exams including the 2023 Gaokao with flawless timing performance.
Energy savings: PoE power supply reduced overall system energy consumption by 30%.
Complete exam room coverage: All 52 exam rooms achieved time synchronization accuracy within 0.3 seconds.
Improved maintenance efficiency: Remote monitoring and management reduced manual inspection time by 80%.
Zero faults during critical exams: Successfully supported 12 national-level exams including the 2023 Gaokao with flawless timing performance.
Energy savings: PoE power supply reduced overall system energy consumption by 30%.
"For over two years, the Shutai clock system has effectively eliminated the persistent problem of exam room time discrepancies. Even within shielded exam environments blocking electronic signals, the built-in atomic clock maintains ultra-high precision, truly ensuring fairness in the time dimension for examinations."
Changsha Shutai Electronics Technology Co., Ltd. specializes in high-end satellite navigation timing products, focusing on R&D, manufacturing, and sales of premium time-frequency solutions. Its products are widely used across hospitals, schools, enterprises, and government institutions. Shutai clocks have become China’s preferred brand for synchronized timing, providing reliable timekeeping for numerous organizations nationwide.
Back to List
Customer Hotline：
