Xinhua News Agency, Chengdu, April 6 (Reporter Yu Li, Feng Changyong) The reporter learned from the China Giant Panda Conservation and Research Center, which has the largest captive giant panda population in the world, that the center has completed nearly half of the breeding and breeding tasks of captive giant pandas this year, and the giant panda breeding has entered a peak period.

　　By the end of 2015, the number of captive giant pandas in the center had reached 218. Zhang Guiquan, director of Ya ‘an Base of China Giant Panda Conservation and Research Center, said that this year, 26 female pandas and 19 male pandas participated in the national captive giant panda breeding program. Since the first female panda was bred in late February, as of April 6, 10 female pandas have been bred. Among them, 6 were bred by natural mating, the other 2 were bred by natural mating with artificial insemination, and the remaining 2 were completely artificially inseminated.

　　"So far, this year’s breeding work has been completed well. The biggest feature is that the natural mating rate is relatively high, and the pregnancy rate of female pandas that have successfully mated naturally is over 90%, which is a good momentum for this year’s breeding work." Zhang Guiquan said.

　　"Under the current captive conditions, the number of male giant pandas with natural mating ability is very rare, accounting for less than 5% of the population. This year, the center belongs to the 7-year-old male giant panda ‘ An An ’ The first successful natural mating at Ya ‘an base on February 29th marks the addition of a male animal with natural mating ability to the captive giant panda population, which also shows that the quality of our captive giant panda population is constantly improving. " Zhang Guiquan said.

　　According to reports, at present, the artificial breeding of captive giant pandas in China is included in the unified planning, and the optimal pairing is carried out according to the principle of eugenics, so as to ensure the genetic diversity of the population to the greatest extent. There are 56 female pandas participating in the breeding program this year, and more than one third of them are from the China Research Center for the Protection of Giant Pandas.

　　There are three major problems in the development of captive giant panda population: difficulty in estrus, difficulty in mating and conception, and difficulty in survival of cubs. According to zhangxin, the breeder of the center, giant pandas are in estrus every spring. With the increase of temperature, their hormone level, estrus behavior and mating desire will decrease from May, which will affect the mating quality. Therefore, March and April are the prime time for giant pandas to breed. In order to ensure that female pandas are pregnant, some will also receive artificial insemination as appropriate after natural mating.

　　In recent years, the artificial breeding of giant pandas in the center has been carried out at Bifengxia base in Ya ‘an. The reporter saw at the base on the 6th that the staff was preparing to breed the 7-year-old female panda "Jojo". Because Jojo’s estrus behavior was not typical enough, she was not allowed to mate naturally. In this regard, Zhang Guiquan said that this is a normal situation.

　　It is reported that female giant pandas not only have a short estrus time, but also need to mate with each other to be successful. If there is no electricity between pandas, mating may fail even during estrus. In addition, even if natural mating is successful, it is very difficult for female giant pandas to finally give birth to panda babies — — Their eggs can only survive for 36 to 40 hours. Even with breeding, only 30% to 40% of female giant pandas can get pregnant successfully, while the survival rate of their cubs is less than 40%.

　　[car home new car on the market] Recently, BMW officially announced (|) that it was officially launched for sale. The new car includes two versions, i4 eDrive40 and i4 M50.The price is 449,900 yuan and 539,900 yuan respectively..

『i4 eDrive40』

　　The design of the new car is similar to that of the BMW 4 Series, and the front face is a huge kidney grille with high recognition. The smooth coupe body design and the hatchback tailgate with strong practicability are expected to be attractive to young consumers. It is worth mentioning that the car will also come standard with M sports kit and star screen air intake grille.

『i4 M50』

　　For the i4 M50 version, the new car will adopt M aerodynamic components, blue M high-performance brake calipers, M family exclusive exterior rearview mirror design, M rear spoiler, M Performance exclusive cerium-gray exterior decoration, M Performance exclusive 19-inch wheels and M tricolor steering wheel stitching, etc., and can choose frosted Portiman blue exclusive car paint.

　　The interior level is also BMW’s latest design style. In front of the driver is a dual-screen composed of a 12.3-inch full LCD instrument and a 14.9-inch central control panel, with the latest iDrive 8.0 information system built in. The system can integrate more third-party applications, such as WeChat car version, Tencent mini-scene and Apple CarPlay. The new car will also have intelligent laser headlights, Harman/Kardon high-end audio system, automatic parking assistance system Plus with 360 panoramic parking images, active cruise control system, forward collision warning and emergency braking assistance, lane rectification assistance, etc. (some of them are equipped with M50 version).

　　In the power system, i4 eDrive40 is a single motor, with a maximum power of 250kW(340 HP), a peak torque of 420 Nm, an acceleration time of 5.7 seconds at 0-100km/h and a cruising range of 625 km under CLTC standards. The maximum power of the dual motors on the i4 M50 is 400kW(544 HP), the peak torque is 795 Nm, the 0-100km/h acceleration time is 3.9 seconds, and the maximum cruising range of the vehicle under CLTC standard is 560 km. (Text/car home Chen Hao)

　　By making good use of the powerful engine endowed by the era of big data, we can seize new opportunities, cultivate new kinetic energy, shape new advantages, and push China’s economy to ride the wind and waves in the digital tide and sail for a bright future of high-quality development.

　　Give birth to new formats, smooth the industrial chain, and let thousands of enterprises "count" into gold. Big data is the driving force for high-quality economic development; Data runs more and people run less errands, making "one network runs" and "one run" the norm. Big data is an "accelerator" to optimize the business environment and improve service efficiency; Dynamically reflect the development trend of economic and social indicators, multi-dimensional and multi-faceted reflect the effect of policies, making social management more refined and intelligent. Big data is the "golden key" to improve the modernization of social governance system and governance capacity … …

　　With the rapid development of digital economy, the huge "treasure" of data is showing unprecedented use value and development potential. During the epidemic prevention and control period, the data in transportation, communication, consumption, taxation, finance and many other fields were organically integrated, which provided effective guidance for epidemic monitoring, prevention and treatment, and resource allocation, helped epidemic prevention and control and resumed production, and became a successful practice for big data to promote economic and social development. The wide application of big data products such as "Health Treasure" has made a vivid data popularization for the whole society, highlighting the significance of big data as a basic strategic resource.

　　The historical experience of human social development shows that every major change in economic form often gives birth to and relies on new factors of production. Just as labor and land are the main factors of production in the agricultural economy era, capital and technology are important factors of production in the industrial economy era. In the digital economy era, data is gradually becoming a new factor of production that drives economic and social development. The Opinions of the Central Committee of the Communist Party of China and the State Council on Building a More Perfect System and Mechanism for Market-oriented Allocation of Factors released last year listed data as one of the five major factors of production, emphasizing the need to speed up the cultivation of the data factor market. Taking data as a factor of production shows that with the acceleration of digital transformation of economic activities, the multiplier effect of data on improving production efficiency is prominent. This is also an important change in the production factors with the most characteristics of the times. As one of the leading countries in the development of global digital economy, China should attach great importance to the important value of data as a new production factor, accelerate the transformation of big data into real productive forces, and inject new kinetic energy and vitality into economic and social development.

　　Make good use of big data, and open sharing is the foundation. The value of big data is first reflected in "big". The accumulation of data is a process from quantitative change to qualitative change. When the development and utilization of data are limited to a certain unit, an industry or a certain field, it will form an information island and it is difficult to play its effective value. To realize the orderly and effective opening of data information in the whole society, it is necessary to establish a public service system for the circulation of data elements, which includes "inter-departmental" data sharing, "government-enterprise" data opening and "enterprise-enterprise" data financing.

　　Using big data well, efficient configuration is the key. As a factor of production, data should be allocated according to the principle of marketization. Under the condition of socialist market economy, it is necessary to give full play to the decisive role of market in allocating resources, smooth the flow channels of data elements, ensure that different market entities have equal access to big data, and maximize benefits and optimize efficiency through market competition in accordance with market rules. At the same time, it is necessary to give full play to the role of the government, improve government regulation and supervision, create a fair market competition environment, and ensure the free flow, safe control and fair competition of data elements.

　　Make good use of big data and standardize according to law is the guarantee. Big data is a "double-edged sword". In the context of the continuous upgrading of information technology, problems such as privacy leakage and "killing" of big data have become increasingly prominent, which has made many people afraid of "counting" and even began to resist data collection and use. To deal with the new problems brought by big data, we must speed up the formulation of relevant laws and regulations and set good rules for the collection, storage, use and release of big data. There are no outsiders in information security. Big data is related to the vital interests of every member of society. Only by standardizing according to law can we foster strengths and avoid weaknesses, and constantly create a healthy, efficient, orderly and controllable big data development environment.

　　Big data contains big opportunities and drives the big future. By making good use of the powerful engine endowed by the era of big data, we can seize new opportunities, cultivate new kinetic energy, shape new advantages, and push China’s economy to ride the wind and waves in the digital tide and sail for a bright future with high quality development.