The Chinese earnings yield differential relative to the U.S. switches from negative to positive around 2009, with the aggregate variation masking substantial cross-sector variation. Changes in sectoral composition and (changing) growth expectations are not important determinants of the variation in China-U.S. valuation differentials. Instead, changes in ownership structure, and most importantly cross-sectional and temporal variation in financial openness, are the key contributors. In addition, we show that IPOs in the banking sector and its internationalization played a critical role in the (relative) valuation change.