Order number

Keyword

Co-occurrence frequency

Order number

Keyword

Co-occurrence frequency

1

Third line construction

155

12

museum

8

2

Industrial heritage

124

13

transform

8

3

Protection and reuse

75

14

Spatial form

8

4

Value evaluation

20

15

Chongqing

7

5

cultural heritage

19

16

Chengkun railway

7

6

Small three lines

17

17

cultural landscape

6

7

Panzhihua city

14

18

Yichang

6

8

Cultural and tourism integration

12

19

Three line spirit

6

9

Research review

11

20

Third-line enterprises

6

10

Industrial building heritage

9

21

Mianyang City

6

11

Industrial heritage corridor

9