The Bundesrat is part of the parliament of Germany. The cabinets of the 16 states of Germany appoint the delegations that represent them in the Bundesrat. They can remove them at any time. Normally, a state delegation is headed by the head of government. The delegation is made up of members of the state government.
China is the world's largest country based on population with a total of 1,330,141,295 people. It is also the world's third largest country in terms of area as it covers 3,705,407 square miles (9,596,961 sq km). China is divided into 23 provinces, five autonomous regions and four direct-controlled municipalities.
I'm assuming that by America you mean The United States. There's no country called America. Even when excluding Taiwan and other disputed territories, China is larger than the United States, both in terms of land area, and in terms of land area including inland waterbodies. By land area only: China: 9,326,410 sq km. United States: 9,161,966 sq km, 1.8% smaller than China.