What is the relationship between Belarus and Belarus?

Although there is only a word difference between Russia and Belarus, they are two completely different countries and different nationalities, which can be seen in the Soviet era, when two different countries joined the Republic. But we seldom pay attention to international news, and it is easy to think that Belarus is Belarus, which is actually wrong. Russian terminology comes from the second-hand translation of Mongolian, and the more correct transliteration should be called "Lucia". In a period of Qing Dynasty, our translation of "Luo Cha" can better reflect the predatory national characteristics of bears. Belarus, on the other hand, can be translated as "Belarus", and this "don't" is now written as "white", which means purity in Russian and is more pure Russian than white. In the period of the Republic of China, the "Belarus" often mentioned is not the Belarusians now, but the Russians who did not agree with the Soviet regime after the October Revolution (mostly Russian aristocrats and revolutionary objects). They are called "Belarus" to distinguish them from "Red Russia" which participated in and supported the revolution. In fact, Belarus is also Russian.

But as can be seen from the name, today's Belarus and Russia have historical origins, and it can be said that they were once the same nation. As we know, Eastern Slavs are mainly composed of Russians, Belarusians and Ukrainians. Their ancestors lived in the area from Dniester River in the west to Dnieper River in the east and the northern part of nomadic people in the Black Sea grassland in the 6th century. Later, in 862, the nobles of guslav in Novgorod invited Ryurik, the leader of the Varyag people in northern Europe, as king, and made Kiev its capital in 882 AD, known as Kiev Ross in history. Russia in Kiev was conquered by Mongols in 1240, and became a vassal state of Mongolian Golden Account Khanate. After the rule of the Golden Tent Khanate, Russians with Moscow as the core inherited the aggression of Mongols, serfs and Ukrainians in the black land of Eastern Europe, and Belarus ruled by the Grand Duchy of Lithuania were formed. Due to the different political environment, Belarusians can retain more traditional culture of Kiev Ross, so they can call themselves more pure Russians, that is, Belarusians.