Quote: "The Taliban now hold the keys to an untouched trillion-dollar trove of minerals including some that could power the world's transition to renewable energies, but Afghanistan has long struggled to tap its vast deposits. ... And Afghanistan sits on a huge reserve of lithium that has not been tapped to this day," said Guillaume Pitron, author of the book "The Rare Metals War. Afghanistan is also home to rare earths that are used in the clean energy sector: Neodymium, praseodymium and dysprosium. The country's untapped mineral riches have been estimated at $1 trillion by the USGS."
Could that be the reason why China, which many people call 'the factory of the world,' would be interested in Afghanistan?
Of course, that may be the main reason. The same article quotes "Ryan Hass, a senior fellow at the Washington-based Brookings Institution think tank. Hass, writes:
"While Chinese leaders are "not enthusiastic" about the Taliban takeover, "they will not allow principle to stand in the way of pragmatism, Beijing's lack of development at its major investment in the Mes Aynak copper mine demonstrates its willingness to exercise patience in pursuit of return on investment."
But, there are other possible reasons. All nations, want good relationships with nations with which they share borders. As China's Asian rail and highway network continues to expand across Asia, Afghanistan could be an important link in extending that network to Africa, where China is already building rail links. (The border region China shares with Pakistan is too mountainous for a rail link, although China-Pakistan co-operation has built an excellent highway through the region
https://www.youtube.com/watch?v=iTyV2BR8ruo
And (surprise, surprise) the new government in Afghanistan may like to have the same development in Afghanistan,