Yeah the Chinese language simply uses parentheses for that purpose. The convention is that each Chinese character is placed into its own parenthesis unlike a regular parenthetical remark. For example, if the one thing being said is ABCD but the other meaning, most likely an ironic one, is WXYZ, the author simply writes A(W)B(X)C(Y)D(Z). Of course this requires the two to have the same number of characters, which is reasonably easy to do.