Table 3 Regional and typological differences in ICR in different historical periods
Prefecture-level city | Prehistory to pre-Qin period | Qin and Han to the Southern and Northern dynasties | Sui-Tang and Five dynasties | Song and Yuan dynasties | Ming and Qing dynasties | Modern and contemporary periods | Total |
|---|---|---|---|---|---|---|---|
Chengdu(CD) | 5 | 8 | 24 | 7 | 69 | 34 | 147 |
Mianyang(MY) | 2 | 6 | 7 | 3 | 60 | 11 | 89 |
Zigong(ZG) | 1 | 0 | 6 | 1 | 36 | 14 | 58 |
Panzhihua(PZH) | 3 | 0 | 0 | 0 | 4 | 8 | 15 |
Luzhou(LZ) | 0 | 3 | 2 | 8 | 42 | 23 | 78 |
Deyang(DY) | 2 | 7 | 2 | 3 | 35 | 0 | 49 |
Guangyuan(GY) | 3 | 3 | 7 | 3 | 40 | 36 | 92 |
Suining(SN) | 0 | 3 | 3 | 5 | 24 | 3 | 38 |
Neijiang(NJ) | 0 | 2 | 8 | 5 | 24 | 10 | 49 |
Leshan(LS) | 0 | 6 | 2 | 2 | 28 | 6 | 44 |
Ziyang(ZY) | 0 | 2 | 17 | 9 | 15 | 3 | 46 |
Yibin(YB) | 0 | 2 | 1 | 5 | 42 | 15 | 65 |
Nanchong(NC) | 2 | 2 | 9 | 8 | 81 | 24 | 126 |
Dazhou(DZ) | 2 | 2 | 4 | 4 | 31 | 14 | 57 |
Ya’an(YA) | 1 | 6 | 9 | 3 | 26 | 22 | 67 |
Aba(AB) | 16 | 3 | 7 | 9 | 37 | 20 | 92 |
Ganzi(GZ) | 1 | 0 | 5 | 8 | 63 | 23 | 100 |
Liangshan(L-S) | 5 | 3 | 2 | 0 | 32 | 18 | 60 |
Guang’an(GA) | 1 | 2 | 3 | 9 | 25 | 11 | 51 |
Bazhong(BZ) | 2 | 7 | 12 | 4 | 40 | 40 | 105 |
Meishan(MS) | 0 | 8 | 14 | 10 | 21 | 4 | 57 |
Chongqing(CQ) | 4 | 7 | 4 | 11 | 10 | 41 | 77 |
Ancient architecture | 0 | 16 | 11 | 46 | 641 | 10 | 724 |
Ancient sites | 38 | 18 | 29 | 20 | 42 | 0 | 147 |
Grottoes and stone carvings | 1 | 5 | 103 | 35 | 27 | 2 | 173 |
Ancient tombs | 11 | 42 | 4 | 16 | 48 | 0 | 121 |
Modern historical sites and representative buildings | 0 | 1 | 1 | 0 | 27 | 368 | 397 |
