良师益友

Explanation: Lessons learned and to help give people a good teacher and good friend 　　Usage: Joint type; as subject, object, attribute; with compliment 　　Source: Qing Pang Yang Ou "black membership innocent people," 20 back: "Although there was a mentor, well-meaning exhortations, but always fallen on deaf ears, and sometimes vertical ear heard, their energies in order for the male, are usually anticlimactic." 　　Examples: ~ Establish diplomatic relations half a century and a farewell, grief is difficult to try to describe the feeling. (Xia Yan, "known to the public this was no grudge - mourning Comrade Guo") Thesaurus:  Mentor a friend who will give forthright admonition