Actually "窶藩慊青・" has a meaning of wish you lucky.
It is similar to 窶堋ィ窶扼窶ケテ in Japan.
"窶藩慊青・" can also called ツ紅 窶「テッ or ツ紅 窶「窶「 窶「テッ , ( in Cantonese, we used to call it 窶藩慊青・ rather than ツ紅 窶「テッ or ツ紅 窶「窶「 窶「テッ, I think ツ紅 窶「テッ or ツ紅 窶「窶「 窶「テッ are used more often in in Mandarin.)
窶藩慊青・ is a little red paper made pocket filled with money. It acts as a present in many Chinese tranditional festival. Giving each other 窶藩慊青・ is a custom in China. The most common practise is to give 窶藩慊青・ to each other in Chinese New Year, wedding and birthday. Red colour represent happy and lucky in Chinese, so 窶藩慊青・ is in red colour.
Usually, only married ones give 窶藩慊青・ to others. Unmarried one no need. (but all people can receive 窶藩慊青・). However, these custom has changed a little bit. In some offices, unmarried one also need to give 窶藩慊青・ to others, I think this custom is diferent in different offices.