This is the 8410th most frequent Chinese word.
ohayoo
The word "ohayoo" is Japanese, not Chinese, and it means "good morning."
Here, 'ohayoo' is used to express a friendly greeting and excitement.
早上好，今天的天气真不错哦，欧哈哟！
Good morning, the weather today is really great, ohayoo!
In this sentence, 'ohayoo' is used colloquially as a morning greeting indicative of the start of a day interacting.
哦哈哟，我刚听说隔壁搬来了新邻居。
Good morning, I just heard that new neighbors have moved next door.
Here, 'ohayoo' frames the interaction with a cheerful initiation of the dialogue.