What are the classification criteria of the sample?

The model project can be used as a model for a certain type of project to follow, to meet a certain scale, to get a certain standard to project works, countries and regions to define the model project and standards are different.

(A) civil construction projects:

1. 150 rooms or more of the hotel project, more than 3,000 seats in the stadium, more than 20,000 seats in the stadium, more than 1,000 seats in the theater or auditorium, the building area of 6,000 square meters of residential and commercial projects, as well as more than 5,000 square meters of other uses of the civil building.

2. The total construction area of 40,000 square meters or more (including 40,000 square meters), complete supporting facilities and can be put into normal use of the overall civil building complex.

3. Building area of more than 1500 square meters of ancient architecture reconstruction or construction projects.

4. Villa projects, can be declared in groups of more than 20 (including 20), with a cumulative floor area of not less than 10,000 square meters.

5. The initial renovation area of the above projects shall not exceed 25%, and the initial renovation part must meet the use function.

(B) industrial buildings and equipment installation projects:

1. Auxiliary supporting functions complete single building area of more than 10,000 square meters of production plants, warehouses.

2. Auxiliary supporting functions in the building area of more than 20,000 square meters of the overall industrial complex.

3. Investment of more than 10 million yuan of relatively independent industrial equipment installation projects or a complete production line.

(C) Municipal Engineering:

Provincial urban planning area with an investment of more than 50 million yuan of urban roads, bridges, tunnels, subways, sewage treatment plants, water treatment plants, water supply systems, drainage systems, with an investment of more than 20 million yuan of flood control, garbage treatment plants (yards) and other municipal infrastructure projects.

(D) Transportation Engineering:

1. New construction, reconstruction of the standard to the second level or above, the length of more than 20 kilometers of highway projects.

2. Newly constructed or reconstructed independent bridges with a total length of 400 meters or a single span of 90 meters or more.

3. 60 meters long, 500 tons or more of inland waterway port terminal project; 80 meters long, more than 1,000 tons of coastal pier project.

4. Locks with a navigational capacity of more than 100 tons.

(E) Power Engineering:

1. Power plant (station) with a single capacity of 135MW or more.

2. Hydroelectric power plant, total installed capacity of 25MW or more.

3. Substation, voltage level 220KV or more.

4. Transmission line, voltage level 500KV or above, line length 15KM or above, cost 100 million yuan or above.

(F) Railway Engineering:

1. Formation stations, stations with an investment of 25 million yuan and above, or 25 kilometers and above the line comprehensive engineering.

2. Two-line tunnels with a length of 1 kilometer and above or single-line tunnels with a length of 2 kilometers and above.

3. Bridges with a length of 800 meters and above or with an investment of 25 million yuan and above.

(VII) water conservancy projects:

The scale of the project is the total reservoir capacity of 25 million cubic meters and above the main project of the reservoir or the cost of 30 million or more water conservancy projects.