The borders between countries, which is the longest border between China and its neighbors

That's right, crossing the border is equivalent to going abroad, don't we have border posts, of course foreign countries also have them, if you accidentally cross the result, the result is not necessarily, you may be driven back, you may be arrested because you are a spy...

There is also a true story (2007).

During training, the Swiss army accidentally crossed the border and mistakenly "invaded" a neighboring country.

According to Xinhua News Agency, Switzerland, a world-famous country of permanent neutrality, was almost involved in "aggressive" activities on 1 July. On the morning of the 1st, a Swiss unit strayed into neighboring Liechtenstein during a routine military training.

A Swiss infantry unit of about 170 men reportedly inadvertently crossed approximately 2 kilometres across the Swiss border into Liechtenstein because it had lost its way and was in a location where there were no border markers. Fortunately, after discovering the mistake, the troops returned "ashamedly".

Swiss military spokesman Lester confirmed the report, but said the "accidental aggression" would not lead to a serious diplomatic conflict between the two countries. "We have informed Liechtenstein**. Lester said the Swiss soldiers who had strayed into Liechtenstein had sabers and rifles, but no bullets.

Liechtenstein, for its part, has no intention of making a big deal out of it. Amman, a spokesman for the country's interior ministry, said they had not even noticed the entry of Swiss troops.

Switzerland is a permanently neutral country, while Liechtenstein is a pocket-sized country with an area of 160 square kilometres, a population of just 10,000, and no army.

National boundaries. National borders, also known as boundaries or borders, are the boundaries of a country's exercise of sovereignty and the geographical boundaries of a country's territory. The national boundary of the territorial land and the territorial sea is usually used as the reference, and the vertical line is drawn up and down, forming the boundary between the country's airspace and the subsoil.

It is the basis for the delimitation of national territory, territorial waters, and airspace, determines the geographical space in which a country exists, and defines the scope of its exercise of national territorial sovereignty, and is relatively stable, limited, and inviolable. The land boundary between neighboring countries is generally demarcated by a treaty or agreement between neighboring countries through negotiation and signing and is demarcated by man-made signs such as boundary pillars and boundary pillars, natural topographical features, straight lines connected between two fixed points, geographical longitude and latitude, or a certain line chosen by the parties concerned. The outer limits of a State's territorial sea shall be determined by the legislation of the sovereign State, and the limits of the territorial sea between neighbouring States shall be determined by the States concerned through consultation.

China's longest border with its neighbors is the China-Mongolia border.

The border between China and Mongolia is 4,710 kilometers long.

The Sino-Russian border is 4,300 kilometers long.

China-Kazakhstan: The border is more than 1,700 kilometers long.

China-Tajikistan: the total length of the border is about 497 km.

China-Kyrgyzstan: The total length of the border is 1,096 km.

China-Afghanistan: The total length of the border is about 92 km.

China-Vietnam: There are more than 1,300 kilometers of land border.

China-Laos: The total length of the border is 505 km.

There are 14 land neighbors: north: North Korea, Russia, Mongolia.

India, Nepal, Bhutan, Myanmar, Laos and Vietnam.

Both China and India and China and Bhutan have agreed to maintain peace and tranquility in the border areas, and have also established a mechanism for meetings of special representatives on the Sino-Indian border issue and a mechanism for border negotiations at the level of foreign ministers of China and Bhutan to work towards resolving the border issue.

Notes:China and Myanmar are examples of friendship and cooperation on the border issue. In 1961, Myanmar successfully completed the demarcation of its border with China through peaceful and friendly negotiations.

Myanmar was the first country to complete peaceful negotiations with China on land demarcation, and such a demarcation and agreement is historic and has further promoted friendly relations between the two sides.

China shares land borders with 14 countries: North Korea, Russia, Kazakhstan, Kyrgyzstan, Tajikistan, Mongolia, Afghanistan, Pakistan, India, Nepal, Bhutan, Myanmar, Laos, and Vietnam.

In the pre-Qin period, the Chinese ethnic group flourished in the Central Plains, and in the Han Dynasty, the Han nationality was formally formed through the integration of honor and culture, laying the foundation of China's main ethnic group. Later, through the integration with the surrounding ethnic groups Qingli Hardship, the situation of a unified multi-ethnic country was gradually formed, and the population continued to rise, with the Chinese population exceeding 100 million in the Song Dynasty and 400 million in the Qing Dynasty.

China is a country with a vast territory, and its borders are bordered by several countries. Let's take a look at the countries bordering China one by one.

First of all, located in the north of China is Russia. China and Russia share a 4,300-kilometre border that includes Northeast China, Inner Mongolia, Xinjiang and other regions. Historically, China and Russia have had abundant exchanges, and there have been extensive cooperation between the two countries in the fields of economy, culture, science and technology.

Secondly, located in western China are countries such as Kazakhstan, Kyrgyzstan, Tajikistan, Afghanistan and Pakistan. The total length of the border between these countries and China reaches 5,485 kilometers, with the Xinjiang region of China having the longest border with these countries. These countries have extensive exchanges and cooperation with China in the fields of history, culture, economy, and energy.

In addition, Vietnam, Laos, Myanmar, India, Bhutan, Nepal and other countries are located in the southern part of China. These countries have a 2,200-kilometre border with China, with China's Yunnan province having the longest border with these countries. These countries have close ties with China in the fields of culture, economy, and tourism.

Finally, located in the east of China is North Korea. China and North Korea share a 1,416-kilometre border that includes parts of China's Jilin and Liaoning provinces. China and the DPRK have close ties in the political, economic, and cultural fields.

This is the country adjacent to the border of the Chinese and Kyivized withered countries. The exchanges and cooperation between these countries and China are not only geopolitically significant, but also have deep cultural and historical ties.

The river that does not belong to the boundary between China and its neighbors is the Pearl River.

In the Pearl River system of Guangdong, the Dongjiang River, the Liuxi River and the Beijiang River flow roughly from northeast to southwest, and the Xijiang River and Tanjiang River flow roughly from west to east, and all converge in the Pearl River Delta network river area, and finally flow into the South China Sea by 8 major gates respectively, and the whole water system is a fan-shaped water system.

The topography of the Pearl River Basin in Guangdong is roughly inclined from north to south, and the highest peak, Shikenggang, is 1,902 meters above sea level. The area of the left bank of the main stream of the Pearl River is more than twice that of the right bank. The density of the river network is relatively large, and the density of the river network in the delta area is more than one kilometer per kilometer.

The bending coefficient of the main stream is that the main stream is a flat river.

Hydrological characteristics of the Pearl River.

The water level of each river in the Pearl River Basin of Guangdong corresponds to the rainfall, generally from April to September as the high water level, and from June to July as the highest water level. The highest water levels in the East and Beijiang rivers occurred in June, while the main stream of the Xijiang River and the Guangzhou waterway had the highest occurrence in June, followed by August.

The main stream of the lower reaches of the Xijiang River is represented by Gaoyao Station, with the average water level meters (the base surface of the Pearl River, the same below) for many years (1931-1988), the highest water level meters measured over the years (July 5, 1949), and the lowest water level meters (February 20, 1955). The amplitude of the highest and lowest water levels measured over the years is meters.