In June, the Port of Abu Dhabi in the United Arab Emirates was scorching with sunlight. The "Tiankun" from China is participating in an international competition. This is a hot international dredging market, where ships from three established European dredging companies operate. They and the "Tiankun" jointly undertake the dredging project of Abu Dhabi Port. As a newcomer to the market competition, the "Tiankun" inevitably carries more scrutiny. Wang Dong, the Chief engineer of the "Tiankun", said frankly: "We have worked hard to smash all doubts with high-quality operations, and win respect and recognition for China's high-end dredging industry. It can dig 6000 cubic meters of sediment per hour, which is equivalent to digging a deep pit of nearly 1 meter from a standard football field; It can also transport the excavated soil to a distance of 15 kilometers. The technology of large dredgers has long been blocked by the West. Although China's dredging industry has a century of history, until the beginning of the 21st century, large and medium-sized dredgers still relied on imports. If you want to develop a large-scale dredger yourself, you have to explore everything from scratch. Lack of talent and experience, in the eyes of industry insiders, is no less difficult than manufacturing domestic aircraft carriers. Gu Ming, former chief engineer of China Communications Tianjin Navigation Bureau Co., Ltd. (hereinafter referred to as China Communications Tianjin Navigation Bureau), once mentioned the scene of being challenged by a foreign company. In 2003, China Communications Aerospace Engineering Corporation planned to build a medium-sized cutter suction dredger with a total installed power of 8000 kilowatts. A leading equipment manufacturer in the foreign dredging industry is offering a price of 300 million yuan. Too expensive! "The leadership team of the bureau thought, could we lower it by another 5 million yuan. Gu Ming has been working in the dredging industry for many years, and he knows in his heart that this price has room for negotiation. However, after receiving the price reduction negotiation from the Chinese side, the company not only did not reduce the price, but also increased it by 5%. I guess you can't do it, just be so reckless. "Gu Ming has a deep memory of this asking price." You said you're not angry. They think you dare not and won't make it yourself. "What should I do? In 2005, under various pressures, China Communications Tianhang Engineering Bureau, in collaboration with domestic industry, academia, and research units, began building the large cutter suction dredger "Tianshi". Afterwards, there were also the "Tianniu" series, the "Binhai" series, and the first ultra large self-propelled cutter suction dredger "Tianjing" designed and built domestically by foreign countries. From single technology to integrated technology, from imitation to self construction, the construction gap of cutter suction dredgers was gradually filled. In December 2015, China's independently designed and constructed "Tiankun" officially began construction. Zhang Xiaofeng, a researcher of the 708 Research Institute of China State Shipbuilding Corporation Corporation and the chief designer of the "Tiankun", told Science and Technology Daily: "From design to construction, the" Tiankun "has touched the" ceiling "of the dredging field, and has once encountered technical bottlenecks in all aspects. Relying on independent innovation, we have finally formed a complete set of design methods and processes for super large self-propelled cutter suction dredgers." We do not build our own, I don't know how deep the pit is inside, in order to build the "Tiankun"