Group 1 - The lecture on the fifth national economic census highlighted its historical significance and role in understanding China's economic landscape [3] - The census comprehensively surveyed the development scale, layout, and efficiency of the secondary and tertiary industries, providing insights into economic interconnections among various sectors [3] - Key data from the census has been officially published, including the "China Economic Census Yearbook 2023," and microdata is available for qualified users [3][6] Group 2 - The lecture served as a platform for scholars to gain deeper insights into China's economic development and structural changes through innovative practices and data applications from the census [6]