we have a business. we're planning to go to china this april 2012. what are the requirements?

1. A single-entry visa is all right if you'll travel to Beijing, Shanghai and Guangzhou continuously without exit mainland China.
2. It takes about 5-6 hours from Beijing to Shanghai by bullet trains and 2.5 hours by plane. It takes about 2.5 hours from Shanghai to Guangzhou by air.
3. If your husband is employed, he needs to submit the SSS ID.
4. There is no need to ask help from a travel agency if you are organized. It usually takes 4 working days for the consular officers to process a visa once all the requirements are submitted.