Harmonized China Health and Retirement Longitudinal Study (Harmonized CHARLS) is an easy-to-use version of data from the first 4 waves of the China Health and Retirement Longitudinal Study (CHARLS) with a set of harmonized variables suitable for cross-country analysis. Using the RAND HRS and Harmonized HRS as models, Harmonized CHARLS defines variables as identically as possible with the RAND HRS and Harmonized HRS to allow users to compare variables with all other Harmonized data sets. Documentation for each variable in Harmonized CHARLS, including a description of its creation, the CHARLS variables used, and descriptive statistics, is detailed in the Harmonized CHARLS codebook.