1 to promote sales

1 tradition

2 traditional

3 convention

4 conventional

5 classifier: 个 gè

1 group buying

2 collective buying

3 buying by a group of individuals who negotiate a discount for the group

1 to buy frenetically

2 to snap up (bargains, dwindling supplies etc)

1 to sell well

2 hot-selling

1 not according with decorum (idiom); scandalous

2 bad form

3 unacceptable behavior

1 to vanish without trace (idiom)

2 to lie low

1 overwhelming sadness (idiom); sorrow at parting