China is a large business tour destination

Visa requirerments
Visas are available from Chinese embassies and consulates in most countries. Visas are required by all foreigners entering mainland China, although visas are not required by Western nationals visiting Hong Kong and Macau.Travelers in transit can stay in China visa-free for up to 24 hours as long as they have an onward air ticket for a flight from China to another destination departing within that time period. A few different types of visas are issued to visitors, including the tourist visa (Type L) that allows the bearer one- to two entries to stay up to one month each time. Consult the Chinese Embassy or Consulate General on obtaining the right type of visa or apply through a travel. Those who wish to work and stay in China for extended periods of time need to apply for employment visa (Type Z), which allows multiple entries into China and is valid for up to one year. The application process is long and bothersome and requirements many, including a complete physical check-up. Upon expiration, the Type Z visa can be renewed with reasonable amount of effort and paperwork.
Read more:
http://www.mfa.gov.cn/eng/
Overseas Assignment to China
Managers who are assigned to work in China need to apply for employment visas. On their first trip into China on the Z visa, they are entitled to bring duty-free reasonable and personal- and household- use items including  dutiable items such as PC, video cameras, etc.
Read more about Business Travel in China:
 http://www.suite101.com/content/business-travel-in-china-a64762#ixzz1VwWX4w5T

The Western businessperson wishing to trade with China needs to be armed with information on the psyche of the country, to keep an eye on the  harmony and loyalty within a group, aware also of the people’s deep patriotism and the need to avoid criticism of the country or the government in any case.
Hierarchy in Chinese Culture
Hierarchy is something that runs deep in Chinese culture and this is continually reasserted during business sessions. Spend time making sure of the relative positions of the people you are dealing with. Always take into account their seniority which influences their hierarchical position. Remember to show respect if your business status is lower.
Face in Chinese Culture
Face is a mark of personal dignity and a core aspect of the Chinese mindset. Never allow your protagonist to lose face, and try not to lose face yourself. It is a strong diplomatic  way of behaviour.
Dress Code for Business Meetings in China
Always wear a suit and tie.
Business Card Etiquette in China
Present business cards with both hands and a slight forward bow.
Gift Giving to Business Partners in China
The giving of gifts is an important part of Chinese business life and should not be  undertaken. don’t treat everyone the same as this would cause loss of face. Give the best gift to the top person. And avoid any suggestion of corruption – a sensitive point in today’s China! Don't give clocks, handkerchiefs, umbrellas, white flowers, knives or scissors as these are considered unlucky.
A pair of something is a good choice, as this indicates harmony.
Suitable gifts are crafts from your home country, or a nice pen.
try to avoid white, black or blue paper when wrapping the gift as these are associated with funerals.  Gold, red and silver are lucky colours.
Serving Food at Chinese Dinners
You cannot pass the following  task on to anyone else, nor can you ignore it:
Your host will serve you (as the honoured guest) and in turn if you are the host you should serve your guest. It is perfectly acceptable to ask for knives and forks although only a spoon may be available. Table manners are more relaxed in China than in the west, but if you  follow the others at the table you will feel better.
If you follow these tips  while doing a business in China  you won't get too wrong.