The first time I traveled to Shenzhen, what was repeated to me most when I looked at its impressive skyscrapers was that until recently it was a small fishing village. And although it is true that this fact is a bit exaggerated and simplified because well, 330,000 inhabitants is not exactly a village and there was more activity than fishing, the reality is that its growth and transformation into the most technological city in the world it has been brilliant: today they live there more than 17 million people and has seen the birth of colossi such as Huawei, Tencent, DJI or BYD.
And of course, the most technological city in the world has one meter at its height, which of course has grown at breakneck speed. Because the history of the transportation network goes hand in hand with the city. But what makes the shenzhen subway It is not so much its size or how quickly it has expanded, but the combination of the previous two with a third variable that rarely appears in the equation: design ambition. While in the West, with rare exceptions, we opt for functional projects that are contained in price and budget, Shenzhen presents entire lines in a few years with stations that seem taken from the cinema. From science fiction cinema.
Shenzhen subway today. Shenzhen subway has 635 kilometers long, 441 stations and 17 operating lines, leading the country in network density (0.30 km/km²) and intensity of use (15,000 trips/km/day). And in this tangle, semi-automatic lines coexist with other fully automated and driverless lines. like Line 20 or very fast as Line 11which reaches 120 km/h.
As a curiosity, the Shenzhen metro network It is operated by two different companies: Shenzhen Metro Group manages the majority of lines and MTR Corporation of Hong Kong operates Line 4 and the recent Line 13. This is something unusual that adds difficulty to the matter in terms of interoperability.
Why is it important. The Shenzhen metro may be unique in its kind, but it is the best argument to demonstrate that speed of execution and quality of design are not incompatible. The third variable in the equation is cost and surprisingly, comparatively it is cheaper: China build for around $250 million per kilometer in purchasing power parity terms, between two and eight times less than Western equivalents like Paris or New York.
On the other hand, the Shenzhen metro acts as an urban catalyst: the stations were planned following the TOD modelthat is, promoting urban development around transport stations. That is to say, they serve the city but also make the city. On a global scale, this network is a methodological reference: it is no longer just a matter of engineering, but also about experience, design and territorial strategy.
The Eye of Shenzhen, the centerpiece of Gangxia North Station, one of its most iconic elements. Unsplash
Context. First of all, a clarification: that fishing village reference usually emphasizes about 30,000 inhabitants in the late 70s, but that figure corresponds to Bao’an County and not the 30,000 of Shenzhen Town, which constituted the original urban core (today Luohu district). The growth is in any case exponential and shows a dispersed demographic base that required territorial reorganization and explains the aggressive growth of the metro network.
But if we have mentioned that figure of 330,000 inhabitants that explains the China Global Television Network is because it was that entire area that was designated as Special Economic Zonea plan that provides advantageous conditions to promote economic development (usually economic laws for a free market economy). In short, the laboratory of Chinese capitalism. Wow it worked. Metro planning began in the 1980s, construction in 1998, and the first line opened in December 2004.
The beginnings were not quick or easy. The subsoil where the Shenzhen metro is integrated did not help at all: weathered granite, high water table and proximity to the Pearl River Delta, which forced the intensive use of specialized tunnel boring machines, jet grouting and even freeze the ground. Neither is the climate: 35 °C with 90% humidity in summer and recurring typhoons that require oversized drainage systems and watertight gates.
The idea of the subway was born before the megacity it is today: in 1983, Mayor Liang Xiang visited Singapore and On his return he made it clear: around Shennan Avenue I would leave a green belt of 30 meters on each side and reserve 16 meters in the center to build it. In 1988 there was a formal light rail proposal. Shenzhen Metro Group was established in July 1998 and construction began that same year. Six years later, on December 28, 2004, he opened the Line 1 with 17.4 kilometers and 15 stations. It was a modest system: four-car trains, 15-minute frequencies and limited coverage to the central corridor on two lines.
How have they done it. Building an average of 30 kilometers a year is simply an unthinkable pace in Europe. The secret is in a large scale prefabrication which allows them to be made in the factory and assembled on site like Lego XXL and meticulous planning from design to maintenance. The avant-garde design of the stations is not accidental but has every intention: for Shenzhen, its subway is its showcase of the identity it wants to project to the world. An example: the Shenzhen eyea spectacular skylight following the Fermat Spiral or the ceiling that simulates an origami of Universiade or maritime integration of the station Sea World between Lines 2 and 12.
The business model is Rail + Property imported from Hong Kong and is equally interesting because it has allowed it to grow without depending on waiting for state/municipal budgets: the operator builds the subway and in exchange receives the right to develop the land around the stations: apartments, offices, shopping centers. Those real estate income are what pay for the railway investment.
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What’s to come. As if the Shenzhen metro itself were not spectacular and large enough, it has some ambitious growth plans in the medium term: by 2028 the network will reach 831 kilometers thanks to nine new lines that are being built in Phase V. Between 2030 and 2035 the goal is to overcome the barrier of one thousand kilometers and make the leap from the metropolitan to the regional, with direct half-hour connections between Shenzhen and the key cities of the Greater Bay Area.
The challenge is to see how a network that is growing so much and so quickly faces maturity in issues such as the heterogeneity of its systems, the maintenance or aging of its older infrastructures. That’s the problem Shenzhen hasn’t had to deal with yet.
Cover | Michael Held and Zhe ZHANG
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