1 . For thousands of years, Chinese writers have travelled all over the country to take down notes about the geographical conditions of each city. Among them, well-known Chinese geographer and writer Li Daoyuan, in the Northern Wei Dynasty (386-534), composed his book, Commentary on the Water Classics, after studying the original literary version, Water Classics. He later expanded the river records to 1, 252 from the original 137.

The book is now being studied again by Professor Li Xiaojie and his team from Fudan University. They have been using drawing software and 3D modelling to recreate the waterway situations on a map based on the book description. So far, they have completed research on four rivers.

“Ancient people knew really well how to apply the power of nature to technical considerations,”Li said, giving the example of Qianjin’e, one of the most famous ancient water conservation projects in Luoyang, Henan. In order to lead the river into the city for irrigation (灌溉) in ancient Luoyang, the officials built a canal branch by separating a northwest-southeast river. However, the canal water wasn't enough to support the citizens in dry seasons. To solve that, on the northern side of the canal branch, the officials built a reservoir (水库) and a channel to lead the water to the canal branch, where the waterways would converge and flow together to the city.

In Commentary on the Water Classics, a total of 2, 800 cities are recorded with details. Still, the process of recreation takes much effort. After doing a lot of text analysis and fieldwork, the team has gradually created the model with 3D modelling software based on repeated deductions (推论).

For Professor Li, the book is not only a record of the natural landscape over 1, 000 years ago, but also a detailed description of humanity and culture and a treasure for today’s reference.

2 . 4 Most walkable cities in Europe

Seville in Spain takes the top spot as Europe’s most walkable city, offering the shortest walking route between the top four tourist attractions.Visitors can explore the impressive Plaza de Espana public square, before wandering over to the UNESCO-listed palace of Real Alcazar and Seville Cathedral. After that, it’s only a short trip on foot to visit the beautiful Barrio Santa Cruz neighbourhood.

Venice is well-known as a heaven for pedestrians (行人), so it’s no surprise it ranks as the second best location for walkable city breaks. There are endless alleyways to explore, as well as plenty of beautiful bridges over the crisscrossing canals that the city is famous for. Just under half an hour of walking here will take you on a tour of the impressive Grand Canal, Doge’s Palace, St Mark’s Square, Basilica and bell tower, all in only 1.3 miles.

Nestled along Portugal’s picturesque coast, Porto comes in third with its top attractions all covered by a 30-minute walking route. Meander along the Dom Luís I Bridge over the Douro River, head to the Clérigos Church Bell Tower and enjoy a riverfront walking place along the Cais da Ribeira. The Stock Exchange Palace is also just a short walk away.

Florence, Italy, secures its place as the fourth most walkable city in Europe thanks to its stunning attractions that can be seamlessly explored on foot. A 1.6 mile route covers the awe-inspiring Piazzale Michelangelo; the famous Uffizi Gallery; the Piazza del Duomo where you will be amazed at the magnificent Florence Cathedral; and the Galleria dell’Accademia, home to Michelangelo’s masterpiece, the statue of David.

3 . A bridge is a structure constructed to connect two places without blocking the way beneath it. Below are four famous bridges in the world.

Bridge of Sighs

The Bridge of Sighs is in Venice, Italy, which was designed by Antonio Contino. The bridge’s construction was begun in 1600 and completed in 1603. The bridge was supposed to be the last view for prisoners, who would sigh at the beauty of Venice, before being taken to prison. That is why it is called the Bridge of Sighs.

Tsing Ma Bridge

The bridge is named after the two islands it connects-Ma Wan and Tsing Yi in Hong Kong. It has both a roadway and a railway and is the longest suspension bridge (悬索桥) with two decks. The bridge is 4518 feet long and 676 feet tall, which was designed by Mott MacDonald. The construction was begun in 1992 and completed in 1997.

Tower Bridge

The Tower Bridge is situated in London, which is a combination of the drawbridge (开合桥) and suspension bridge. Designed by Horace Jones and John Wolfe Barry, it was built between 1886 and 1894. The bridge stretches across the River Thames near the Tower of London. The drawbridge is drawn about 1,000 times a year.

Golden Gate Bridge

The Golden Gate Bridge joins the Pacific Ocean and San Francisco Bay, whose chief designer was Jbseph Strauss. The bridge has been named the most beautiful and most photographed bridge in the world. It is 8,981 feet long, 746 feet tall and 90 feet wide. Construction of the bridge was begun in 1933 and completed in 1937. In 1987, the bridge was named a California historic landmark.

With thousands of fishing lights blanketing its surface, Erhai Lake in Dali Bai Autonomous Prefecture, southwest China’s Yunnan Province,     1     (offer) a splendid night view since the annual ecological regulation of fish populations in Erhai Lake began on August 21.

As darkness falls each night, fishing boats travel across the lake and fishing lights     2     (gradual) cover the lake with fishing nets stretching across the water. In videos made with time-lapse (延时拍摄的) photography, stars in the night sky appear to fall into Erhai Lake,     3     (create) a fantastical and dreamlike shape of incredible beauty.

The 2023 ecological regulation of fish populations in Erhai Lake aims to completely     4     (strength) biodiversity protection, taking full advantage     5     the structure of fish populations and effectively guarding against and controlling dangerous alien species.

Based on various fish     6     (type) , this year’s regulation efforts are divided into three stages across the lake’s waters, the core protected areas of the Cangshan Erhai National Nature Reserve not     7     (include) .

The first stage     8     (schedule) to last from August 21 to September 20, with a focus on the sharpbelly and other species of small-sized fish.     9     number of families applying for and receiving ecological regulation permits reached as many as 590, with     10     they could enter the lake to conduct fishing activities during the permitted periods.

6 . Mexico has more than just beaches. Several Mexican cities have been recognized as forming part of the heritage of humanity and are considered to be of outstanding universal value.

Oaxaca

Oaxaca and the nearby archaeological site Monte Alban have both been recognized by UNESCO. Oaxaca, the capital city of the state of the same name, was founded in 1529 and offers a good example of previous Spanish town planning. Oaxaca is considered one of Mexico’s best foodie destinations. Learn what foods and drinks you should try in Oaxaca.

Guanajuato

As a silver mining town in the past, Guanajuato seems special. The winding streets and small squares give it a more friendly feel than some of the other cities. This is a student town with a vibrant culture and an important cultural festival — the International Cervantino Festival which is held every October.

Puebla

Puebla is one of Mexico’s large cities, but its historical center can easily be explored on foot. It has some special historical structures such as the 16th-century cathedral and some other fine buildings with walls covered in tiles.

Morelia

Morelia, the capital of the state of Michoacán, was originally called Valladolid, but its name was changed in honor of independence hero José María Morelos y Pavón. The Museo del Dulce is a stop you shouldn’t miss in Morelia. Visits to nearby Patzcuaro or the reserves are also recommended on a trip to Morelia.

7 . Paris is the capital of the European nation of France. It is also one of the most beautiful and most famous cities in the world.

Paris is called the City of Light. It is also an international fashion center. What women are wearing in Paris will be worn by women all over the world. Paris is also a famous world center of education. Foe example, it is where the headquarters of UNESCO, the United Nations Educational, Scientific and Cultural Organization.

The Seine River divides the city into two parts. Thirty –two bridges cross this beautiful river. The oldest and perhaps most well-known is the Point Neuf, which was built in the sixteenth century. The Sorbonne, a famous university, stands on the left bank of the river. There are many other famous places in Paris, such as the famous museum, the Louvre, as well as the Notre Dame. However, the most famous building in this city is Eiffel Tower.

Paris is named after a group of people called the Parisii. They built a small village on an island in the middle of the Seine River about two thousand years ago. This island, called the lle de la Cite, is where Notre Dame lies. Today around eight million people live in the Paris area.

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