【固定资产投资额】以货币形式表现的在一定时期内建造和购置固定资产的工作量以及与此有关的费用的总称。该指标是反映固定资产投资规模、结构和发展速度的综合性指标，又是观察工程进度和考核投资效果的重要依据。

【房地产开发投资】各种登记注册类型的房地产开发公司、商品房建设公司及其他房地产开发单位统一开发的包括统代建、拆迁还建的住宅、厂房、仓库、饭店、宾馆、度假村、写字楼、办公楼等房屋建筑物和配套的服务设施、土地开发工程，如道路、给水、排水、供电、供热、通讯、平整场地等基础设施工程的投资。包括实际从事房地产开发或经营活动的附营房地产开发单位。不包括单纯的土地交易活动。

【房屋施工面积】指报告期内施工的全部房屋建筑面积。包括本期新开工的面积和上期开工跨入本期继续施工的房屋面积，以及上期已停建在本期复工的房屋面积。本期竣工和本期施工后又停缓建的房屋，其建筑面积仍计入本期房屋施工面积中。

【房屋竣工面积】指在报告期内房屋建筑按照设计要求已全部完工，达到住人和使用条件，经验收鉴定合格（或达到竣工验收标准），可正式移交使用的各栋房屋建筑面积的总和。

【Total Investment in Fixed Assets】refers to the volume of activities in construction and purchases of fixed assets and related fees, expressed in monetary terms. It is a comprehensive indicator which shows the size, structure and growth of the investment in fixed assets, providing basis for observing the progress of construction projects and evaluating results of investment.

【Investment in Real Estate Development】It includes the investment by the real estate development companies, commercial buildings construction companies and other real estate development units of various types of ownership in the construction of house buildings, such as residential buildings, factory buildings, warehouses, hotels, guesthouses, holiday villages, office buildings, and the complementary service facilities and land development projects, such as roads, water supply, water drainage, power supply, heating, telecommunications, land leveling and other projects of infrastructure. It covers the activities of the non-real estate companies in real estate development or management, but excludes the activities in simple land transactions.

【Floor Space under Construction 】refers to total floor space of all buildings under construction during the reference period, including floor space of newly started buildings during the reference period, floor space of construction extended from the previous period to the current period, and floor space of construction suspended during the previous period but resumed in the current period. Floor space of construction completed in the current period and floor space of construction started and then suspended in the current period are still included in floor space under construction.

【Floor Space of Buildings Completed】refer to the floor space of housing construction in accordance with the design requirements have been completed In the reporting period, to live and the conditions of use, have been checked or reach the completion acceptance criteria, of housing construction put to use.