那只是过去
[nèi zhĭ shì guò qù]
The direct translation would be "That's just the past", signifying reflection and remembrance while hinting at moving on from old events. The person seems to be looking back calmly and bidding farewell to the past. It expresses not only recollection but also a positive attitude towards letting things bygones be bygones. When mentioning the past, the individual acknowledges its impact yet maintains detachment, embracing present moments wholeheartedly and moving forward with ease without lingering regrets.