earnestly and sincerely (idiom); with all sincerity
Definitions (Wiktionary)
adv
earnestly and sincerely
我們要誠心誠意地積極幫助少數民族發展經濟建設和文化建設。
我们要诚心诚意地积极帮助少数民族发展经济建设和文化建设。
wǒ men yào chéng xīn chéng yì de jī jí bāng zhù shǎo shù mín zú fā zhǎn jīng jì jiàn shè hé wén huà jiàn shè ． We must sincerely and actively help the minority nationalities to develop their economy and culture.
Definitions (HSK3.0)
HSK3 七一九级词汇表 #457
Examples (Wiktionary)
Mandarin
我们要诚心诚意地积极帮助少数民族发展经济建设和文化建设。
我們要誠心誠意地積極幫助少數民族發展經濟建設和文化建設。
wǒ men yào chéng xīn chéng yì de jī jí bāng zhù shǎo shù mín zú fā zhǎn jīng jì jiàn shè hé wén huà jiàn shè ．
We must sincerely and actively help the minority nationalities to develop their economy and culture.
Mandarin
共产党员在和友党友军发生关系的时候，应该坚持团结抗日的立场，坚持统一战线的纲领，成为实行抗战任务的模范；应该言必信，行必果，不傲慢，诚心诚意地和友党友军商量问题，协同工作，成为统一战线中各党相互关系的模范。
共產黨員在和友黨友軍發生關係的時候，應該堅持團結抗日的立場，堅持統一戰線的綱領，成為實行抗戰任務的模範；應該言必信，行必果，不傲慢，誠心誠意地和友黨友軍商量問題，協同工作，成為統一戰線中各黨相互關係的模範。
gòng chǎn dǎng yuán zài hé yǒu dǎng yǒu jūn fā shēng guān xì de shí hou ， yīng gāi jiān chí tuán jié kàng rì de lì chǎng ， jiān chí tǒng yī zhàn xiàn de gāng lǐng ， chéng wéi shí xíng kàng zhàn rèn wù de mó fàn ； yīng gāi yán bì xìn ， xíng bì guǒ ， bù ào màn ， chéng xīn chéng yì de hé yǒu dǎng yǒu jūn shāng liang wèn tí ， xié tóng gōng zuò ， chéng wéi tǒng yī zhàn xiàn zhōng gè dǎng xiāng hù guān xì de mó fàn ．
In their relations with friendly parties and armies, Communists should take a firm stand of unity for resistance to Japan, uphold the programme of the united front and set an example in carrying out the tasks of resistance; they should be true in word and resolute in deed, free from arrogance and sincere in consulting and co-operating with the friendly parties and armies, and they should be models in inter-party relations within the united front.