The Chinese government bureaucracy under the Tang (618-906 CE) and Song (960-1279 CE) dynasties had several similarities and differences in terms of organization, functions, and methods of recruitment. Both dynasties adopted the imperial examination system, established a hierarchical bureaucracy, and utilized local administration. However, there were significant differences in terms of the scope of government functions, the extent of Confucianism influence, and changes in the examination system.

Under the Tang and Song dynasties, the Chinese government bureaucracy was organized in a hierarchical structure with various levels of officials, from local administrators to central government officials. The imperial examination system was utilized to recruit officials based on their knowledge of Confucian classics, writing skills, and understanding of statecraft. This merit-based system allowed individuals from different social backgrounds to enter government service based on their abilities, rather than their family background.

Both dynasties had a strong emphasis on Confucianism, which influenced the ethical standards and values expected of government officials. Confucian principles such as filial piety, loyalty, and benevolence were emphasized in the training of officials, who were expected to adhere to high moral standards in their conduct and decision-making.

While the Tang dynasty had a more expansive government structure with a strong military component, the Song dynasty focused more on civil administration and economic management. The Song government centralized its power through the establishment of a professional bureaucracy, which specialized in different areas such as finance, justice, and military affairs. This allowed for greater efficiency and specialization in government functions.

Changes in the imperial examination system were also observed between the Tang and Song dynasties. During the Tang dynasty, the examination system was more open and inclusive, with a greater number of candidates participating in the exams. However, under the Song dynasty, there was a shift towards a more standardized and restrictive examination system, with a focus on memorization and regurgitation of Confucian classics. This led to a more homogenous group of officials who were trained in a specific way, which some scholars argue may have limited innovation and diversity in government decision-making.