衷心 | zhōng xīn | heartfelt / wholehearted / cordial | |
真心实意 | zhēn xīn shí yì | genuine and sincere (idiom) / wholehearted | |
赤胆忠心 | chì dǎn zhōng xīn | lit. red-bellied devotion (idiom) / wholehearted loyalty / to serve sb with body and soul | |
披肝沥胆 | pī gān lì dǎn | lit. to open one's liver and drip gall (idiom) / wholehearted loyalty |