By Paul Carsten and Jane Lanhee Lee BEIJING/SHANGHAI (Reuters) – For Yuan Yue, a Chinese graduate student in international trade, moving all of her spare cash to an online investment fund called Yue Bao was a no brainer. The yield is even higher than a bank time deposit, but a time deposit ties up your money … so its better to just keep it in Yue Bao, because you can use the money anytime. Yue Bao, available on smartphones, is conveniently linked to Chinas biggest online payments platform Alipay, similar to PayPal and owned by an affiliate of e-commerce giant Alibaba Group Holding Ltd. Users can dip directly into Yue Bao to pay for goods bought online. Chinas banking industry is behind those of developed markets but its number of Internet users, now more than 618 million, is sparking a boom in online and mobile payments.