Try a task-based lesson.
Even if they're low or pre-beginners, they should have a good time brainstorming ideas and you should have no trouble eliciting words associated with Chinese New Year.
candy, money, red, horse (year of), firecracker, family, sing songs "gongxi gongxi gongxi ni", happy time, holiday, fun, fish, rice, soup, etc etc...then you could, after getting the words on the board (draw pictures if they can't read),
sort the words.
1.what do you eat for chinese new year? (prosody or 'body language' helps if they don't understand 'eat')
chicken, duck, fish, rice, new year cake, candy...
2.what do you do?
I get money! i watch tv! i visit my grandma! i play computer games! i go to SOGO! i watch my mommy and daddy play mahjongg!
3. who do you see? i see my auntie! i see my big uncle!...
4. where do you go? i go to Hsinchu! i go to the countryside! ....
5. what do you LIKE? I like the money! I like the candy!
then maybe as a participatory activity, you could get them to make a story together about something that happens during chinese new year. ie> the crazy auntie comes to visit>what happens? get them to tell the story together, if possible.
get them to talk/write about what they want to buy with their hong baos. if they can't talk well, or write, get them to draw pictures.
then...put the pictures/stories around the classroom for show and tell time.