@uetian98
Dear Brother,
Both cars (Daweoo and Chevrolet Matiz) are ineed the same car. Originally its a Daewoo vehicle. Daewoo Motor Co. was bought by General Motors Corp. in 2002. They then added this car to their Chevrolet line-up for European, Asian and Middle East markets. In Korea and i guess in some far east countries its still sold as Daewoo Matiz. This car is a badge-engineered Daewoo car.
Its other names are:
Chevrolet Exclusive
Chevrolet Joy
Chevrolet Spark
Pontiac Matiz G2
I hope my reply has solved the mystery for you. 
Regards,