青學堂 Qing School

正體字：乾淨
簡體字：干净 [gānjìng] 

 「乾」means dry, and 「乾淨」means cleaning a place or things well. 

Dear all:
We sincerely invite you to do an academic survey. It is for people who have learned mandarin as second language more than one month in Shanghai or Beijin.  It takes about 15 minutes. We have a beautiful gift for you after you submit it.