Question: The Bible doesn't speak of other cultures and peoples on the other side of the planet (i.e. Chinese). Why not?
Answer: Part of the answer to your question is that after the flood of Genesis 7-8 the Middle East is where Noah and his family repopulated the earth from. After Abraham came to faith, God chose one nation (Israel) to work through in the Old Testament, but faith was never to be limited to only Israel. They were strategically located at the crossroads of commerce and highways in their day. God wanted the nations of the world to witness the faith of Israel.
After the birth of the Church in Acts 2, we are very much instructed to follow the Great Commission found in Matthew 28:19-20 where Jesus said, "Go therefore and make disciples of all the nations, baptizing them in the name of the Father and of the Son and of the Holy Spirit, teaching them to observe all things that I have commanded you; and lo, I am with you always, even to the end of the age. Amen." Notice God's focus on going out into the nations.
The Earth was repopulated from the Middle East after the flood, and people gradually spread out afterward. When the Bible was written, the Middle East was very much the core of the known world at the time. Now that mankind has spread out, the Church has the mission of reaching all countries and peoples. We must remember, God is not done with Israel (Romans 9-11) and in the future God will rule and reign from Jerusalem. Therefore, the Bible treats the land of Israel differently than the land in the rest of the world, because it belongs to God and His people (Israel). Therefore, we see in the Bible a special focus on this land.
