七年新陈代谢
[qī nián xīn chén dài xiè]
In this context, '七年（seven years）' may refer to 'seven-year itch', implying that significant life changes often occur after seven years, while '新陈代谢 (新陈and generation)' implies renewal or rejuvenation after change and adjustment. The user is expressing their hope for growth or evolution.