be on the right/wrong track idiom
做法对路；方法得当
to be doing something in a way that will bring good/bad results; to be thinking in the right/wrong way
These results suggest that we are on the right track. 这些结果表明，我们的做法是正确的。
If you think my son was involved, you are on the wrong track. 如果你认为我的儿子与这有关系，那你就错了。