Thomas Derksen, or A Fu as Chinese netizens call him, has recently gone through a cashless day in Shanghai, and wrote about his experience in an open letter to German Chancellor Angela Merkel, according to German media. /VCG Photo

From vegetable stalls to scenic spots, Derksen handled all payments with his cellphone. "When I was in Germany, I had to carry my wallet and cash. Here I found the era of mobile payment has arrived…It’s time for Germany to learn from China,” he said. /VCG Photo

Mobile payments are growing rapidly in China. In a recent study by global consultancy Labbrand, 85.6 percent of Chinese millennials use mobile payment apps to purchase things. /VCG Photo