Under the threat of global climate change, China has proposed a dual carbon goal of peak carbon and carbon neutrality. As the vital carrier for territorial spatial planning, production–living–ecological (PLE) spaces drive carbon emissions and are important to the dual carbon goals. In this study, carbon emissions and sinks of PLE spaces in cities in Heilongjiang Province from 2005 to 2020 were calculated and spatial–temporal changes were analyzed. The carbon emission structure was analyzed in segmentation sectors. The land use changes and socioeconomic factors on carbon emissions were analyzed, and emission reduction strategies were implemented. The results show the following: (1) Carbon emissions from production and living spaces increased yearly. Carbon sinks were smaller than emissions, but capacity was stable. (2) Higher-emission cities were concentrated in southwest Heilongjiang, and carbon emission differences between regions gradually increased. (3) Among carbon emission sectors, agricultural and household made up smaller proportions, while animal husbandry, industrial, transportation, and traffic travel contributed most. Carbon emission structures were transformed by adjusting urban development and industrial structure. (4) For most cities, industrial space was the main emission space, but agricultural production and urban–rural living spaces dominated in some cities. (5) GDP, urbanization rate, and area of city paved roads suppressed emissions in cities with decreased carbon emission grades. The industrial structure and coal consumption inhibited emissions in cities with maintaining and increasing carbon emissions grades.

Addressing the relationship between limited resources and a growing population is a hot issue during the process of urbanization. Effective utilization of rainwater plays a positive role in a low-carbon strategy. The purpose of this study is to present an application of mathematical analytical tools for urban planners in predicting rainwater runoff before constructing. Based on available data and a practical investigation in the study area (Harbin Institute of Technology), this study classifies the area into four parts according to the different runoff coefficients and then evaluates the volume of runoff based on the data of average volume of rainfall and evaporation capacity using mathematical analytical tools. The results show the minimum volume of water reservoirs in a single area. This research will contribute to an understanding of the role played by water resources in low-carbon-precinct buildings in the scientific planning of runoff treatment systems.

With the improvement of material living standards, the degree of concern for urban leisure space is more increasingly. Public open space is the carrier of the demand for people to experience. And the experience that enriches the activities and enhances the vitality is the feelings of the public activities of people. The paper analyzes the current situation of the public open space of the central of Hulan based on experience perspective. According to the entertainment, esthetic, escapist and education experience needs, the paper put forward the principles. And put forward the tactics on the system planning of public open place. Finally it has guiding significance to the system planning of public open place of the center of Hulan.