1. Secondary source
We collect information from official publications as well as statistics and data released by industry associations, governmental organizations and commercial organizations to learn basic industry information, industrial structure, market elements and industry trend and more. We also try to obtain some information by interviewing some professionals. C&G Consulting Inc is a member of many industry associations including Machinery Industry Association, China Machinery Industry Federation, China Petroleum and Chemical Industry Association, Optical and Electronic Cable Association of China, China Association of Automobile Manufactures, China Electricity Council, China Real Estate Association.

2. Primary source
Our researchers and partners collect first hand information through the field survey by clients’ requests through the following methods:
Face to face interview: Interviewers talk to interviewees face to face to obtain information. The sample size and criteria of sample selection are determined by clients.
Telephone interview: The call center telephone interviews the selected interviewees to get information according to questions provided by clients.
Interview via mail: Mail or deliver the questionnaires to the target interviewees such as subscribers of some magazines. We can go to where the interviewees live to collect the questionnaires in Beijing, Xi’an, Shenyang, Changchu and Chongqing if this is more convenient for the interviewees. Interview via mail we conduct can cover more than 2 million households in China.
Focus group discussion: One or more topics can be discussed by a group of people in a meeting, which will usually be presided by a host who is experienced in interview survey and knows much about the discussed topic(s).
In-depth interview: In-depth interview includes free talk and semi-controlled interview. We know many an industry insider and government official as a result of our long-term cooperation with some industry associations and governmental organizations, enabling us to learn some important industry information and policy.

3. Quality control

Work out the complete organizational structure of a project team according to the project's principle and internal process. Each member has their separate responsibility and they also co-operate on the project.
Project manager	Senior supervisor	Supervisor	Sample maker
	Quality control specialist		Interviewer
	Data analyst	statistician
	Industry research manager	Researcher
	Industry research manager	Researcher
Using rich experience and operational skills, monitor project team, techniques and the whole process during the project research. Project supervisors need to attend a three-month company training and finish more than 3 projects supervised by senior supervisors before they can do projects independently. Selection of interviewers: interviewers have to undergo a basic company training and training on rules and regulations for part-time interviewers, sign confidential agreement and pass the exam of our company before they can start work for our company. Independent quality control: monitor data collection and use Build a complete sample frame and modify and update the sample frame and sample addresses regularly. Make strict sampling procedure and monitor the field survey closely Scientific project management ensures operation coherence of the project involved with multi-areas and comparability of data. Close supervision of the projects as well as constant liaison with clients.