Since 1999, the global industrial gas market has grown strongly, with an average annual growth rate of over 7%. The overall scale has expanded rapidly from 26 billion euros in 1999 to 35.8 billion euros in 2004, and is expected to reach 51 billion euros in 2009. According to the statistics of 2005, six major industrial gas companies account for the majority of the world industrial gas market, among which Linde accounts for 21%, Air Liquide accounts for 19%, Praxair accounts for 13%, air chemistry accounts for 10%, Japanese acid accounts for 4%, and Messer accounts for 1%. From 2006 to 2007, the performance of the six gas companies remained outstanding.

　　Linde Group: in September 2006, Linde Group completed the acquisition of British Boise gas company (BOC), becoming the world's largest specialized gas and equipment group company and the first professional gas company to enter the world's top 500. In 2007, Linde signed a new long-term gas supply contract (with an investment of 100 million euros) with borsodchem chemical company of Hungary, which strengthened its leading position in the region; after the acquisition of Engi gas company of Albania, Linde became the main gas supplier in the Mediterranean coastal region; in Malaysia, Linde acquired 98% of the shares of Malaysian oxygen company. In the first half of 2007, Linde's sales revenue increased by 12.7% to 5.88bn euros. (Linde Group was founded in 1879)

　　Air Liquide: in 2006, the acquisition of Ruqi's business in Germany was launched in an all-round way. Air Liquide achieved strong growth in all business areas and regions, with sales revenue reaching 10.949 billion euros, including 9.628 billion euros in the gas sector (accounting for 88% of the total sales revenue), and achieved annual net profit of more than 1 billion euros for the first time. In the first half of 2007, Air France took some important strategic development steps: acquiring the old technology and engineering company Ruqi, Germany, to further strengthen its capabilities in the development of hydrogen, coal gasification, biodiesel and large industrial businesses; establishing new R & D and technology centers in the United States; It has acquired shares of several Asian joint ventures, further strengthened its strength in Japan, Singapore, Thailand, Vietnam and other countries; further expanded its liquid business scale in the United States, Russia, China and Vietnam; before the acquisition, Linde's healthcare business in the United Kingdom, and also made five small-scale acquisitions in Germany. In the first half of 2007, Air France achieved sales revenue of 5.629 billion euros (up 6.3% from 5.483 billion euros in the first half of 2006), and gas business increased by 5.8% to 4.912 billion euros. The strong demand of global liquid market has driven the growth of liquid business by 4.7%; the demand of electronic industry for high-purity safe gas business by 10.1%; and the growth of health care business by 6.6%. (founded in 1902)

　　Praxair: focus on new areas and new areas to achieve stable development. In 2006, Praxair's global business reached a record $8.3 billion, with a growth rate of 9%. In the first half of 2007, the business of Praxair reached US $4.507 billion, up 9.87% year on year. The annual growth rate of Praxair will be 8% - 12% by 2010. In addition, Praxair focuses on heavy oil recovery, refining hydrogen, coal chemical industry, integrated coal gasification combined cycle power generation, oxygen coal gasification carbon dioxide recovery and immobilization technology and other fields. We also want to expand our business in South America (Brazil), Mexico, China and India. (founded in 1907)

　　Air chemistry: pursuing profitable growth in 2006, the sales revenue of American air chemicals company reached 8.85 billion US dollars. According to the strategy, the company's organizational structure was rebuilt, and $500 million of the $1.5 billion stock repurchase plan was completed. The value of American air chemical company pursues profitable growth, including: pursuing high stability of business, long-term contract, continuous predictable cash flow, strong balance sheet; continuous profitable growth, rational utilization of resources, balance of price and profit, expansion of production capacity, etc. (founded in 1940)

　　Nisin (Co., Ltd.): the short-term goal is to expand the market and achieve an annual sales volume of 500 billion yen. The short-term goal is to expand the market scale and strive to reach 10% of the global market share, with an annual sales revenue of 500 billion yen (about 4.2 billion US dollars). Strive to achieve sales revenue of JPY 450 billion and net income of JPY 20 billion by fiscal year 2009. The future performance growth mainly comes from the acquisition of BOC's nitrogen business, which accounts for 10% of the global market share, and the acquisition of LINWELL, a medium-sized gas company in the United States. In February 2007, its U.S. subsidiary operated a 600t / D low-energy air separation unit; it plans to add two air separation units of the same scale in North America. A large air separation unit will be put into operation in Singapore and the Philippines. (founded in 1910)

　　Messer Germany: the world's largest private multinational gas company, Messer was founded in 1898. In 2006, the sales revenue of Messer Group was 630 million euros (the same period in 2005 was 575 million euros). Messer's strategy is to ensure the long-term and independent operation of the company. In January 2006, Messer Group and Hangzhou hang Yang established a joint venture in the field of equipment in Frankfurt, Germany. The first set of air separation equipment provided by Hang Yang has successfully realized commercial operation in Europe. Messer Group expects to maintain a growth rate of about 7.5% by 2010, including 5% in Western Europe, 5% in Central Europe, 6% in Southeast Europe and 19% in Asia.