Fig. 1. Map of cited proxies that used for reconstruction on hydroclimate in China

Fig. 2. The dry/wet index series (left) and power spectrum (right) for the past 2000 years in central-eastern China (a) and its sub-regions of North China Plain (b), Jiang-Huai Area (b), and Jiangnan Area(d)

Fig. 3. Hydroclimate reconstructions based on multi-proxies in Northeast China and semi-arid region in North China

Fig. 4. Precipitation reconstructions based on tree rings in Northwest China

Fig. 5. Dry/wet changes in the north of Tibetan Plateau based on tree rings over the past 3000 years

Fig. 6. Dry/wet changes reconstructed from tree rings in the south of Tibetan Plateau over the past 1000 years

Fig. 7. Comparison on the changes of precipitations from previous July to current June in the northeast (a) and south (b) of Tibetan Plateau, and the bar chart between (a) and (b) shows their correlation coefficient in the 50-year running windows