Here are some possible ways to convey a similar feeling in Chinese, depending on the context:
* Informal:
* 嗨 (hāi): This is the most common way to say "hi" in Chinese, and it can be used in both casual and formal settings.
* 你好 (nǐ hǎo): This is a more formal greeting, but it can also be used informally with friends and family.
* 嘿 (hēi): This is a very casual greeting, similar to "hey" in English.
* More formal:
* 您好 (nín hǎo): This is a more formal greeting, used when addressing someone older or in a position of authority.
* 早上好 (zǎo shàng hǎo): This means "good morning."
* 下午好 (xià wǔ hǎo): This means "good afternoon."
* 晚上好 (wǎn shàng hǎo): This means "good evening."
The best way to express "Hiya" in Chinese would be to use one of these greetings based on the specific situation and your relationship with the person you are greeting.