I. Project Name

China Postal Savings Bank Network Time Synchronization System Construction Project

II. Duration of Cooperation

Long-term cooperation

• Corporate Profile of the Postal Savings Bank of China

China Postal Savings Bank is a major state-owned commercial bank in China, committed to providing comprehensive financial services to both individual and corporate clients across multiple business lines, including deposits, loans, settlement, wealth management, and investment banking. As a key player in the financial sector, it operates a nationwide service network with an extensive distributed infrastructure. IT Systems and massive volumes of financial data place extremely high demands on the precision, security, and stability of system time synchronization, ensuring the compliant and orderly execution of core functions such as trade settlement, data storage, and risk management.

IV. Purchased Products

Beijing Zhongxinchuang Technology Co., Ltd. DNTS-9 Domestication of Information Technology Innovation NTP Server, accompanying components 30 Meter‑scale cable, high‑sensitivity timing antenna, mounting bracket, power cord, and a CD containing multi‑system synchronization reference software; optional accessories include an antenna feed line surge arrester and an ultra‑long‑distance antenna.

V. Customer Requirements

1. In financial‑service scenarios, high‑precision time synchronization must ensure temporal consistency across tens of thousands of terminal devices in a distributed network, thereby guaranteeing the temporal accuracy of transaction records and audit logs. In securities‑based high‑frequency trading, timestamp precision at the microsecond level is required, while the insurance industry needs to support precise traceability of policy inception and claims‑processing timelines.
2. It features high security and compliance, supporting rigorous identity authentication, access control, and operational auditing, in accordance with industry standards such as the Measures for the Administration of Bank Card Clearing Institutions and the Measures for the Administration of Information Security Assurance in the Securities and Futures Industry, and meets the requirements of the Multi-Level Protection Scheme. 2.0 Requirements for Level 3 and above.
3. The system must exhibit high reliability, continuing to deliver stable time‑synchronization services even under extreme conditions such as satellite signal outages, thereby preventing risks like transaction interruptions and settlement failures and ensuring… 7×24 Hourly business continuity.
4. Supports adaptation to domestically developed, indigenous innovation (XinChuang) platforms; core hardware and software components must meet requirements for independent control and compliance, and be compatible with the financial industry’s XinChuang ecosystem.
5. It provides convenient operations and maintenance management features, including log aggregation and export, anomaly alerts, and tiered access control, while supporting multi‑branch and cross‑regional management scenarios to reduce O&M costs.

VI. Solution

1. Core equipment deployment: adopts DNTS-9 Domestication of Information Technology Innovation NTP As the core time‑synchronization device, the server obtains standard time from the BeiDou Navigation Satellite System and supports NTP/SNTP/PTP Supports multiple protocols, with internal synchronization accuracy reaching 20ns， NTP Timing accuracy 5us , a single network port can support 90000 Next / Second-level time‑synchronization requests meet the massive‑scale terminal synchronization needs of industries such as banking, securities, and insurance, and are particularly well suited to high‑concurrency timing scenarios in high‑frequency trading systems.
2. Dual‑backup and time‑keeping design: Equipped with a dual‑receiver, dual‑antenna redundant architecture and satellite signal priority settings; when satellite signals are lost, the built-in aerospace‑grade atomic clock is activated. / The temperature-compensated crystal oscillator maintains timekeeping, with timing performance superior to… 500ns/day (Rubidium atomic clock configuration), ensuring uninterrupted time synchronization for critical applications such as securities trading and insurance claims processing.
3. End-to-end security assurance: Enabled SSH/Web Features such as password complexity validation, password expiration management, and login timeout settings; supports access control blacklists and whitelists, syslog Remote auditing: the core firmware employs dual encryption and a four‑stage signature authentication scheme, and uses Chinese national cryptographic algorithms to encrypt time‑signal transmission, thereby mitigating security risks such as replay attacks and time tampering.
4. Intelligent Operations and Maintenance System: Through DNTS Manager Centralized management software that enables real-time monitoring of servers and clients; supports daily… / Weekly / Generated on an annual cycle Excel Format synchronization log, which can monitor the status of secondary servers and configure settings. IP Hierarchy whitelist; via syslog 、 SNMP 、 email and other channels to distribute satellites, antennas, and NTP Service anomaly alerts, tailored to meet the remote operations and maintenance needs of cross-regional financial institutions.
5. Domestic adaptation: The servers use Hygon processors. CPU , Ziguang (ChangXin) memory, Yangtze Memory Technologies SSD It supports domestically developed core hardware and runs on a domestic server‑grade operating system, fully meeting the requirements for building indigenous innovation (XinChuang) platforms in the banking, securities, and insurance sectors, thereby ensuring independent control over key technologies.
6. 

VII. Implementation Outcomes

1. Time synchronization accuracy meets the standard: All networked terminal devices achieve precise synchronization with the BeiDou standard time, with time deviations kept at the microsecond level. This satisfies the time‑consistency requirements of scenarios such as bank transaction clearing, high‑frequency securities trading, and insurance policy traceability, and complies with the Basel Accords. MiFID II The precision requirements for timestamps under international regulatory frameworks.
2. System stability has been significantly enhanced: the dual‑machine redundant architecture and the built-in timekeeping module ensure that… 99.99% The aforementioned service availability ensures stable timekeeping even during satellite signal outages, with no business interruptions caused by time‑synchronization issues, making it well suited for the financial industry. 7×24 24-hour uninterrupted service required.
3. Security and compliance requirements are met: Through multi-layered encryption authentication, access control, and auditing mechanisms, unauthorized access and configuration tampering are effectively prevented, ensuring compliance with relevant standards such as the Information Security Classified Protection framework for the financial sector and the security safeguards for the securities and futures industries, and successfully passing regulatory compliance reviews.
4. Operational Efficiency Optimization: Intelligent log aggregation, tiered management, and anomaly alerting streamline multi‑branch and cross‑regional operations, reducing labor costs. Operations personnel can remotely monitor devices and adjust configurations.
5. Domestic Adaptation and Implementation: The entire workflow leverages domestically developed core components, supporting the construction of a domestically produced information technology innovation (ITI) system in the financial sector, ensuring independent control over critical technologies, and providing foundational security for banking, securities, insurance, and other business operations.

VIII. Wide-ranging Applications Across Industries

Leveraging its core strengths—high precision, robust security, and domestic‑vendor compatibility—the solution has successfully met the time‑synchronization needs of customers across multiple segments in the financial industry. Its peer‑group clients include:

(1) Banking Institutions

1. State-owned major banks: People’s Bank of China, Bank of China, Industrial and Commercial Bank of China, Bank of Communications, China Merchants Bank, CITIC Bank, Shanghai Pudong Development Bank, China Everbright Bank, and others;
2. City Commercial Bank / Rural Commercial Bank / Rural Credit Cooperatives: Jiangsu Bank, Chongqing Bank, Qinghai Bank, Cangzhou Bank, Guiyang Bank, Changsha Bank, Shaoxing Bank, Hankou Bank, Hubei Bank, Lishui Rural Commercial Bank, Tangshan Bank, China Resources Bank of Zhuhai, Baoding Rural Commercial Bank, Guilin Bank, Jiangyin Rural Commercial Bank, Chongqing Fumin Bank, Taizhou City Commercial Bank, Hubei Rural Credit Cooperative Bank, Jiangsu Jiangnan Rural Commercial Bank, Pinghu Rural Cooperative Bank in Zhejiang, Huarong Xiangjiang Bank, Hebei Provincial Rural Credit Cooperatives, Yunnan Provincial Rural Credit Cooperatives, Guiyang Rural Commercial Bank, Nanxun Rural Cooperative Bank, Deqing Rural Cooperative Bank, Huzhou Wuxing Rural Cooperative Bank, Liaoning Provincial Rural Credit Cooperatives, Beijing Rural Credit Cooperatives, Zhejiang Provincial Credit Union, Guangxi Rural Credit Cooperatives, Jiaxing Hecheng Commercial Bank, Longchuan Rural Commercial Bank in Yunnan, Shandong Provincial City Commercial Banks, Langfang Bank, Guangxi Beibu Gulf Bank, Lianghe Rural Commercial Bank, Zhangjiagang Rural Commercial Bank in Jiangsu, Wuhan Rural Commercial Bank, Leshan City Commercial Bank, Beijing Rural Commercial Bank, Henan Rural Commercial Bank, and others.
3. Liquidation / Credit reporting agencies: the Rural Credit Union Funds Clearing Center, the Shanghai UnionPay Center, and the People’s Bank of China Credit Reference Center.

(II) Securities / Fund / Trust institutions

Shanghai Clearing House, China International Capital Corporation, Shenzhen United Property Exchange, Shanxi Securities, Changjiang Securities, Huatai Securities, CITIC Securities, CCB Trust, China Asset Management, Xinhua Asset Management, Hua’an Fund, Hualong Securities, China Securities Finance Corporation, China Securities Depository & Clearing Corporation, and CCB Fund, among others.

(3) Insurance Institutions

China Life Insurance, Yingda Property Insurance, Xinhua Life Insurance, Dubang Property Insurance, Taikang Insurance, Xintai Life Insurance, Yingda Insurance, Xingfu Life Insurance, Xinhua Pension, Huatai Insurance, Shenzhen Ping An, Guoyuan Agricultural Insurance, and others.