strategy game, Civilization VI, economic alliance, two leaders shaking hands, gold coins exchange, trade routes, city-state, international trade, diplomacy screen, parchment background, medieval attire, detailed textures, silk and velvet, soft ambient lighting, isometric view, vibrant colors, lush greenery, bustling market, caravans, merchant ships, harbor, trade district, grand cityscape, advanced technology, cultural exchange, peaceful atmosphere, alliance treaty, parchment and quill, economic growth, prosperity, 3D rendering, high-resolution textures, strategic partnership, global economy, world map, hex tiles.