chéngshú de shōukǒu huì gěi biérén liú xià hǎo yìnxiàng, yě gěi wèilái jīhuì liú kōngjiān

成熟的收口会给别人留下好印象，也给未来机会留空间。

A mature closing remark leaves a good impression on others and leaves room for future opportunities.