chinese character set question

Database

chinese character set question

I have a table ,It's definition is below:
create multiset table a (
num int
,text_1 varchar(100)
)
primary index(num)
on commit preserve rows;

Table have one hundred thousand rows,this is three rows of them:(1,'this is a test1') (2,'这是一个test2') (3,'yeah 这是 the one test3)
now I want to select the rows which contains chinese words, so how can I do using SQL? who can help me?
thanks in advance!