脚踏两只船

Explanation: Metaphor and a clear understanding of things undecided, or to opportunistic and with two different aspects of maintaining relationships. 　　Usage: The main predicate; as predicate, attributive, clause; containing derogatory 　　Source: Ding Ling, "the sun shines on the Sanggan River": "He is dating another girl, another child when he was eight enterprises, radishes, red skin goes white." 　　Examples: He is ~, do not rate his children when eight, radishes, red skin goes white. (Ding Ling, "the sun shines on the Sanggan River," a h) Thesaurus:  Feet On both sides barque, be on the fence, hedge