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"Affected by the combination of rising international commodity prices and high market expectations, steel prices in the domestic market rose violently after May Day, and the price of rebar easily broke through the 6000 yuan mark and set a new record. As of May 25, the average price per ton of grade III rebar in major cities in China was 5125 yuan, an increase of 657 yuan per ton compared with the end of the first quarter and 15% compared with the same period last year 43 yuan, "said Yu Yaping, an analyst at China United Steel network. For the reasons for the sharp rise in the price of building materials, Kong Haifa said that it was more commercial factors. "With the gradual improvement of the epidemic situation, a large number of infrastructure projects have been launched quickly, and the increase of demand has led to the rapid rise of the price of building materials; at the same time, after some backward production capacity has been eliminated and shut down in recent years, the overall production capacity of steel, cement and other building materials has been in a state of contraction. Instead of obvious expansion, the overall scale of this year is still shrinking further." "The cost of building materials, as an important part of the construction and installation project cost, accounts for about 55%. The price fluctuation of building materials has a great impact on the cost of construction enterprises." Sun Lu, head of Jiangsu construction project cost management station, said that if the overall increase of building materials exceeds a certain range, the original expected profit of construction enterprises may be offset by the increase of building materials.

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In July, the national carbon emission trading market was launched, and people from all walks of life continued to pay attention to it. The first batch of 2225 power companies that have entered the market have an annual total carbon dioxide emission of more than 4 billion tons. Today, the national carbon emission trading market is "full moon", but few people talk about it in the construction industry. In fact, as a major carbon emitter, the construction industry should pay close attention to the dynamics of the carbon emission trading market. The root cause of the construction industry's "indifference" to carbon emission trading is that, on the one hand, they do not know enough about it, on the other hand, they equate it with the relevant measures of the notice on carrying out the pilot work of carbon emission trading issued by the national development and Reform Commission in 2011. After the release of the document, the national development and Reform Commission agreed to carry out pilot projects in seven regions, including Beijing and Shenzhen. In 2013, Shenzhen launched a pilot project in the fields of industry, construction and transportation. The first batch of public buildings included in the trading system include 198 public buildings (large office buildings, shopping malls and tourist hotels). The pilot projects in other regions are similar to those in Shenzhen. It can be seen that the previous pilot projects mainly covered existing buildings, and the scope was small. If construction enterprises compare it with the carbon emission trading that will fully cover all industries, it is definitely a misunderstanding of the country's determination to promote green and low-carbon development.

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