China rejects Vietnam to remove oil rig

The video discusses China's commercial exploration in its waters, the rapid development of its internet sector, and the policies supporting foreign investment. It also covers the activation of a lighthouse in the South China Sea, emphasizing China's commitment to international responsibilities and maintaining navigation freedom and safety.

What is the purpose of activating the lighthouse at Bi Island according to the text?

In what ways does China aim to contribute to the South China Sea according to the text?