你说的没错，两岸对立对双方都没有好处，只会带来政治、经济等多方面的不利局面，协同合作，共同发展确是百利而无一害的做法。
nǐshuōde méicuò ，liǎngàn duìlì duì shuāngfāng dōu méiyǒu hǎochu ，zhī huì dàilái zhèngzhì 、jīngjì děng duō fāngmiàn de bùlì júmiàn ，xiétóng to collaborate ，gòngtóng fāzhǎn què shì bǎilìérwúyīhài de zuòfǎ 。
You're right, the opposition across the strait was of no advantage to either side, it only brought disadvantages in terms of politics, economics and others aspects. There is much to gain from working together towards joint development and nothing to lose.