China is improving its digital currency – the electronic yuan – and it seems that it has more plans to use it as a means of payment. China’s central bank recently launched its own wallet app (wallet software for smartphones). This wallet app is already partially available on the China App Store. According to Chinese data, it already has 140 million users. Experts believe: The one-party state is putting the Beijing Olympics at the back of its mind here. I want foreigners to use the currency too. A reason why many US Republican senators warn US Olympians not to use…