成也萧何，败也萧何
chéng​yě​xiāo​hé​bài​yě​xiāo​hé

be both one's success and one's failure

成也萧何，败也萧何 成也蕭何，敗也蕭何 chéng​yě​xiāo​hé​bài​yě​xiāo​hé
be both one's success and one's failure
One's success and failure are both due to the same factor or person; alludes to the historical figure 萧何 xiāo​hé who both helped 韩信 hán​xìn rise to power and later plotted his downfall.