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 preserves rows;
Table 'a' have three rows:(1,'this is a test1') (2,'这是一个test2') (3,'this is ?哈哈test3')
now I want to know which row contains chinese word,so how can I do using SQL?