You can take the exam twice a year. This is to better promote the popularization of Putonghua promotion test, encourage the general public and employees of enterprises and institutions to actively participate in Putonghua proficiency test, improve Putonghua level, and strengthen social awareness and promotion of Putonghua. Dongguan is a prefecture-level city in the south of Guangdong Province, China, and one of the central cities in the Pearl River Delta economic circle.