like birds that pair off wing to wing or trees that have their branches intertwined—deep affection of a devoted couple
比翼連枝bi yi lian zhi
like birds that pair off wing to wing or trees that have their branches interwind(meaning deep affection of a devoted couple)
比翼連枝bǐ yì lián zhī
比翼：一種鳥名。比喻夫婦親密不離。fly side by side or trees with their branches interwined