命里有时终须有命里无时莫强求
[mìng lĭ yŏu shí zhōng xū yŏu mìng lĭ wú shí mò qiáng qiú]
An idiom indicating destiny; if something is destined then eventually it shall happen naturally; if fate doesn't arrange something one must not pursue it forcefully or overly expect its appearance/occurrence.