Table 2. The part of co-occurrence matrix based on all keywords.
| K1 | K2 | K3 | K4 | K5 | K6 | K7 | K8 | K9 | K10 | |
| K1 | 0 | 812 | 1107 | 969 | 837 | 866 | 668 | 553 | 571 | 412 |
| K2 | 812 | 0 | 969 | 901 | 749 | 831 | 559 | 501 | 484 | 464 |
| K3 | 1107 | 969 | 0 | 1217 | 920 | 1151 | 764 | 840 | 575 | 443 |
| K4 | 969 | 901 | 1217 | 0 | 894 | 1022 | 647 | 625 | 600 | 425 |
| K5 | 837 | 749 | 920 | 894 | 0 | 789 | 543 | 470 | 503 | 371 |
| K6 | 866 | 831 | 1151 | 1022 | 789 | 0 | 577 | 641 | 569 | 412 |
| K7 | 668 | 559 | 764 | 647 | 543 | 577 | 0 | 346 | 358 | 301 |
| K8 | 553 | 501 | 840 | 625 | 470 | 641 | 346 | 0 | 303 | 237 |
| K9 | 571 | 484 | 575 | 600 | 503 | 569 | 358 | 303 | 0 | 248 |
| K10 | 412 | 464 | 443 | 425 | 371 | 412 | 301 | 237 | 248 | 0 |
K1 = China, K2 = Economic, K3 = Member State, K4 = International, K5 = Country, K6 = Region, K7 = Russia, K8 = Meeting, K9 = Relationship, K10 = Energy.