Limitations and considerations
Source columns with CHAR/VARCHAR data types and a non-Latin collation (e.g. "Chinese_PRC_CI_AS") need to be mapped to NVARCHAR. This can be done by defining a global transformation for all tables in the replication task or by defining a single transformation for a specific table.
For more information on defining transformations, see Starting the Global Transformation Rules wizard and Defining transformations for a single table/view.