I Transmigrated Between Two Worlds and Got Rich Reselling Goods

The protagonist lives in a modern first-tier Chinese city in the ordinary 21st century, where technology is advanced and goods are plentiful. Modern light-industry necessities, food, hardware, and electronics are extremely cheap to produce, while the other world's traditional porcelain, tea, silk, wild medicinal herbs, antique paintings and calligraphy, gold, and silver are luxury goods and collectibles in the modern world, worth several times more. Together, these differences create a perfect two-way trading loop.