On 23 September 2020, the People's Bank of China ("PboC") issued the Financial Data Security - Guidelines for Data Security Classification (JR/T 0197-2020) (《金融数据安全 数据安全分级指南(JR/T 0197-2020)》) (the "Financial Data Classification Guidelines"). Based on the Cybersecurity Law of the People's Republic of China(《中华人民共和国网络安全法》) (the "Cybersecurity Law") and the existing data protection rules, the Financial Data Classification Guidelines put forward systematic and specific requirements in the field of data classification for financial institutions. In this legal commentary, we will analyze the key points of the Financial Data Classification Guidelines from the perspective of corporate compliance, with a focus on how the new requirements under the Financial Data Classification Guidelines overlay existing regulations and standards.