Oracle database character set is AMERICAN_AMERICA US7ASCII, version 11 gr2 from 9 I have, have been using Toad for Oracle9.7 version, Chinese processing is normal, but the recent want to upgrade to the Toad for Oracle13.0.0.80 versions of the same client, as well as the configuration of the 13 version of Toad after connecting to the database, Chinese display garbled, and version 9.7 is normal, search the solution to a lot of people on the net, has failed to solve for the great god had experience, help to solve it,