The climate created by the mountainous areas in the east has an impact on people’s lives. The easterly wind’s passage across the mountainous areas is subject to the Foehn effect, creating a warm and dry wind in the western downwind side of the mountain range. People living in the areas to the east of the high mountains experience considerable inconveniences with regard to transportation, as these areas have undergone very little development compared to the area to the west of the high mountains. However, the slow pace of development has brought at least one advantage to local residents: the natural sceneries have remained unspoilt and many people now choose these areas as travel destinations.
The East Sea has a relatively straight, featureless coastline, and the difference between high and low tide is only 30cm. However, the sea along the coast is generally deeper than 1,000m. According to the result of a sonar measurement carried out by the Korea Hydrographic and Oceanographic Administration, the deepest part of the East Sea lies in the area north of Ulleungdo Island (2,985m deep). In contrast, the sea along the West Sea is shallow, which has led to the formation of wide tidal flats.
During the summer holiday season, Haeundae Beach in Busan attracts around 1 million visitors per day. Gyeongpodae Beach in Gangneung and Daecheon Beach on the West Sea are also popular holiday destinations during the summer.
In winter, people enjoy skating and skiing across the country. There are many ski slopes in Gangwon-do Province. Winter snowfall in the mountainous areas of Gangwon-do sometimes reaches 50 - 60cm in a day or two. The average daytime temperature in spring and fall is maintained at 15 - 18˚C. In these seasons, the sky is clear and the weather is pleasant and agreeable, encouraging many people to engage in outdoor activities or go on a trip.
Recently, the Korean Peninsula has shown signs of transition to a subtropical climate amid the phenomenon of global warming. In summer, the temperature rises above 35˚C. In spring, azaleas and forsythias bloom earlier than in the past. Over the past 4 -5 years, many new and extraordinary climate-related records have been reported. In December 2010, a cold wave hit the peninsula for 39 days, lasting well into January of the following year. Heavy snowfall hit Donghae and Pohang, breaking a 79-year-old record. In July 2011, the heavy rain concentrated on Seoul and its vicinity was recorded as the heaviest daily rainfall in the meteorological history of the country. 
Summer heat waves have become more common, and precipitation patterns are also changing. During the monsoon seasons in the past, rain used to fall nationwide due to the influence of a wet front. Today, torrential downpours, which bring rain to a concentrated area, are often observed. In winter, heavy snow also tends to fall in concentrated regions. Only 10 years ago, it was usual for cold and warm weather to succeed each other on the peninsula every three or four days, but that pattern has almost completely disappeared as well.
Population
Archaeologists think that people started settling in the Korean Peninsula around B.C. 700,000, during the Paleolithic Age. South Korea’s 2017 population was estimated at 51.42 million, and according to the 2017 Population and Housing Census, 49.6% of the population resided in the Seoul metropolitan area. This was up by 0.5% from 49.1% in 2010, showing a distinct trend towards concentration of population in the capital. 
Meanwhile, the country’s low birth rate has emerged as a serious social problem. The total fertility rate, which represents the average number of children that a woman can have throughout her lifetime, stood at 1.17 in 2016. The figure fell after rebounding from a record low of 1.08 in 2005, thanks to the government’s measures to encourage childbirth. The number of newborns in 2016 was also the lowest at 406,300. Meanwhile the life expectancy of South Koreans reached to 82.1 years (as of 2016), higher than the OECD average. 
The international migration of South Koreans began at the end of the 19th century and the early 20th century with people leaving for China and Russia. Around the mid-20th century after the 1945 Liberation of Korea, the United States was their main destination, though Koreans also started to emigrate to diverse regions around the world including Europe, the Middle East, and South America. 
As a result, the number of overseas Koreans amounted to 7.4 million (2016) spread across 194 countries. Statistics showed that the largest number of expatriate Koreans were in China (2.55 million), followed by the United States (2.49 million), Japan (820,000), and Canada (240,000).
Since 2011, the net inflow of population has outnumbered the net outflow. The number of foreign nationals residing or working in the country has increased dramatically, particularly since 2000. According to Statistics Korea, 407,000 foreign nationals arrived in the country in 2016, the net outflow totaled 75,000, which was up by 14,000 YoY, while 714,000 foreign nationals arrived in the country. Regarding the purpose of their arrival in the country, employment (31.8%) topped the list, followed by short-term stay (30.4%), study (13.1%), and arrivals of overseas Koreans (12.8%). In particular, the number of foreign nationals who enter South Korea for study or training jumped by 30.1% YoY, the largest figure since 2000 (as of 2016).
Language and Letters
Most linguists place Korean in the Altaic language family, though some consider it to be a language isolate, meaning that it cannot be simply related with any other language. The written form of Korean uses Hangeul, a writing system commissioned by King Sejong (1397-1450) during the Joseon Dynasty. Koreans are very proud of this remarkable achievement, and Hangeul is a very efficient and easy script to learn and use.
Hangeul is composed of fourteen consonants and ten vowels. It can express virtually all the sounds produced by nature and humans. Every year, UNESCO presents the King Sejong Literacy Prize to people who have made a distinguished contribution to the elimination of illiteracy. The inclusion of ‘King Sejong’ in the name of the prize may be said to be tacit recognition of his greatest accomplishment, the creation of Hangeul, which is easy to learn and use.1. National Hangeul MuseumThe museum was established to preserve, disseminate, and recreate the value of hangeul and its culture. The picture shows the hangeul photo zone installed in the exhibition hall of the museum.
2. King Sejong the GreatSejong was the fourth king of the Joseon Dynasty. He made many great accomplishments in the spheres of science, economy, defense, art and culture. One of his greatest accomplishments was the creation of Hangeul in 1443, an easy-to-learn, efficient, and scientific writing system. He is respected as one of the country’s greatest kings among Koreans.

National Flag (Taegeukgi)
The national flag of Republic of Korea is composed of a red and blue taegeuk pattern in the center and four black trigrams at each corner, against a white background.
The white background symbolizes brightness, purity, and peace loving ethnic characteristics. The taegeuk pattern symbolizes yin and yang (i.e. the idea that all things in the universe are created and evolve through the interaction of yin and yang). The four trigrams indicate the changes in and development of yin and yang by means of their combination (” represents yin while represents yang; [geongwae] heaven;[gongwae] earth;[gamgwae] water; and igwae] fire. The four trigrams surrounding the taegeuk represent unity.
The national flag, including the taegeuk pattern, which our ancestors liked to use in their lives, expresses the ideal of the Korean nation’s pursuit of creativity and prosperity.
National Anthem (Aegukga) 
The country’s national anthem was composed in 1935 by Mr. Ahn Eak-tai, who added a melody to lyrics written in the early 1900s. It was officially adopted with the establishment of the government of the Republic of Korea in August 1948. Prior to that, the country sang the same lyrics to the melody of Auld Lang Syne as the national anthem. 
National Flower (Mugunghwa)
The Mugunghwa (Rose of Sharon) is thought to be deeply associated with what are regarded as the most typical Korean characteristics: a sincere heart, inwardness, and tenacity. Around the late 9th century, the Chinese referred to Korea as “the country of mugunghwa.” The Korean word mugunghwa literally means a “never-withering flower.” The country’s national anthem includes the line: “Three thousand ri of splendid rivers and mountains covered with mugunghwa blossoms.” The emblem of the government and the National Assembly contains the shape of a mugunghwa. 

National anthem

Aegukga (Patriotic Song)

1. National flower (Mugunghwa)
2. National flag (Taegeukgi)

Political System

The country has adopted a Presidential system in which the President is elected by the direct vote of the people for a five-year term. President Moon Jae-in was sworn in as the 19th president of South Korea on May 10, 2017.

The government is composed of three independent branches: the Executive branch; the Legislative branch composed of 300 four-year term members of the National Assembly; and the Judiciary branch, which includes fourteen six-year term Supreme Court justices. There are seventeen regional local governments and 226 basic local governments. The heads of the local governments and the members of local councils are each elected for a four-year term. 

Division

In 1948, the two Koreas established their respective governments. Defined as two different countries under international law, they joined the United Nations simultaneously in September 1991. The Constitution of Republic of Korea, however, regards North Korea as part of the Republic of Korea.