Tourist visa or dependant visa from Ho Chi Minh City

Dear Sir/Madam,

I am a student in Shanghai, China with a valid resident visa which expires in July 2014. I live with my son who is 7years old and goes to school in Shanghai. Nobody informed us that if you are on a student visa, your child can only extend the visa two times until this time when my son's visa was extended for only one month until 22nd September, 2012. We hope to come to Ho Chi Minh City to apply for a new visa for my son. I would like to know if you will be open between 21st September to 30th September and also to know how many days will it take for us to have a visa for my son and how much money do you charge for his visa.