It’s “so” nice.
Chinese people like to emphasize their feelings by using words like “really”, “so”, “extremely”. In fact, some people in China do have a tendency to exaggerate their feelings about different things, and the following phrase is what young people often use.
How to say in Chinese: 不要不要的 (bú yào bú yào de) = extremely
不要 means “don’t want”, however, 不要不要的 (bú yào bú yào de) is often used these days to emphasize an adjective. It’s used in the following sentence structure:
“adjective + 的(de) +不要不要的 (bú yào bú yào de)”.