"恭喜恭喜"

Trivia: this is a popular song during Chinese New Year in many Mandarin-speaking countries and has also been translated into other languages as well.  

Lunar New Year is a festival that celebrates the beginning of a new year on the traditional lunar calendar, and is one of the most important holidays in China. It has strongly influenced other Lunar New Years of neighboring cultures like Vietnam's Tết and Tibet's Losar.

People often celebrate Lunar New Year with spending time with loved ones, spring cleaning, wearing red, eating traditional foods, attending festivals with lion dancing, fireworks, traditional dancing, hanging red banners across doorways with fortuitous sayings, praying in temples, and children receiving red envelopes with money.