"The grass looks greener on the other sides of the fence." That is an old saying in English.It means other places often look better,more interesting than the place where you live.Some people worry that young Chinese are beginning to feel that way .They see young Chinese ignoringing Chinese cultrue and,instead,buying Japanese cartoon books,watching Korean soap operas and even celebrating western holidays.
  Foreign books and soap operas are good,but Chinese writers and actors are just as good.As for holidays,,Christmas is nice,but it can never have the meaning for Chinese that the Spring Festival has,and the West has nothing to compare with the Mid-autumn Festival.And let's not forget the part of Chinese culture I like best:its friendliness.Not all countries are as warm as China.

   It's good to enjoy other cultures and to learn from them,but they cannot replace your own culture .It's good to look on the other side of the fence,but make sure you take a good long look.You will find that the grass isn't always greener on the other side of the fence.

老师，Some people worry that young Chinese are beginning to feel that way .这句话的that way是什么意思?