zìjǐ bù quèdìng shí, zhíjiē shuō nín hǎo gèng wěn, yě gèng shǎo màofàn fēngxiǎn

自己不确定时，直接说“您好”更稳，也更少冒犯风险。

When you're not sure, directly saying 'Hello' is safer and less likely to cause offense.