With the support of the Ministry of Science and Technology and the National Natural Science Foundation of China, a research team led by Prof. Hai Cheng at the Institute of Global Environmental Change, Xian Jiaotong University, have now extended the Chinese cave delta~(18)O record to cover the full uranium/thorium dating range, the past 640000 years. The new composite record provides an unprecedented characterization of Asian monsoon variability on a wide range of timescales. The comparison of the monsoon record to marine and polar ice core records reveals that the terminations during the past 640000 years are indeed separated by four or five precession cycles, thus confirming the idea that the 100000-year ice age cycle is an average of discrete numbers of precession cycles. Furthermore, since the cave delta~(18)O variability closely follows boreal summer insolation, removal of insolation component from the Chinese delta~(18)O record generates a residual cave record. By design, the residual record contains a history of suborbital-scale variations of Asian monsoon as well as of as any additional orbital-scale variability that does not correlate with boreal summer insolation. The analysis of residual record suggests the monsoon rainfall variability on a suborbital timescale exhibits a striking similarity to detrended Antarctic temperature variancea result demonstrating a natural simplicity. The spectral powers of the residual record show significant precession and obliquity signals that are much stronger than eccentricity signal and nearly anti-phased with summer boreal insolation and Antarctic temperature. These observations indicate that insolation, in part, sets the pace of the occurrence of millennial-scale events, including those associated with terminations and unfinished terminations and thus provide new insight into the longstanding classic issue, the 100 ka problem. Another salient aspect of their studies is it reinforces the idea that temporal variations in Chinese and Indian cave delta~(18)O records follows the boreal summer insolation closely. They explained this observation in terms of changes in spatially integrated monsoon rainfall between the tropical monsoon sources and the cave site. As such, their finding supports the classic prediction by John Kutzbach ~35 years ago that monsoon rainfall should respond to changes in summer solar insolation. The new record also characterized for the first time the Asian monsoon variance during the MIS 11 and suggested that the monsoon has increased overall in an anomalous fashion relative to the downward trend in boreal summer insolation in the past 2 ka, manifesting a 2-ka shift with a possible mechanism similar to millennial-scale events observed throughout much of the past several hundred thousand years. These results provide a new view regarding the Holocene climate variations. In addition, the research show that the supra-regional climate variance in Westerly Central Asia exhibits a precessional rhythm, punctuated by millennial-scale abrupt climate events, suggesting a close coupling with the Asian monsoon, while the local hydroclimatic variability at the cave sites shows climate variations that are distinctly different from their supra-regional modes. These observations reconcile the apparent out-of-phase hydroclimatic variability, inferred from the Holocene lake proxy records, between Westerly Central Asia and Monsoon Asia.