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The regions of origin of the 15 samples.
| No. | Region | No. | Region |
|---|---|---|---|
| S1 | Haikou, Hainan | S9 | Huangshan, Anhui |
| S2 | Baotou, Neimemg | S10 | Jinzhai, Anhui |
| S3 | Taishan, Shandong | S11 | Xinyang, Henan |
| S4 | Jiaxing, Shandong | S12 | Dali, Yunnan |
| S5 | Jilin, Jilin | S13 | Tianlin, Guangxi |
| S6 | Changbaishan, Jilin | S14 | Shanghai |
| S7 | Changchun, Jilin | S15 | Fuzhou, Fujian |
| S8 | Jingzhou, Hunan |
