What do you mean by first-class service for 3-3.5 people in 50,000 square meters?

This sentence describes a project or site, which may be a planning and design scheme, including three aspects of information: "first-class service", "50,000 square meters" and "3-3.5 people". According to relevant public information, the "first-class service" in this sentence refers to the service level, which is usually used to measure the modernization and service quality of hotels, commercial buildings and other service industries. And "50,000 square meters" means that the total construction area of the project or site is 50,000 square meters. The last "3-3.5 people" may refer to the population density of the project or site, that is, the number of people per square meter may be between 3-3.5 people.