Group 1 - The core viewpoint of the articles highlights the continuous expansion of Zhengzhou's urban built-up area, indicating significant urban development and growth in population and infrastructure [1][2][3] Group 2 - In 2024, the urban built-up area of Zhengzhou's central urban area is projected to be 822.30 square kilometers, with a total built-up area of 1431.65 square kilometers across the city, marking increases of 25.6 square kilometers and 19.43 square kilometers respectively compared to 2023 [1] - The built-up area has shown consistent growth over the years, with the central urban area expanding from 774.32 square kilometers in 2022 to 796.70 square kilometers in 2023, and further growth expected in 2024 [2] - Zhengzhou's population surpassed 13 million in 2023, with projections indicating it could reach 18 million by 2035, suggesting ongoing urban expansion and increased demand for infrastructure and services [3]