RESEARCH firm eMarket PREDICTED that China will become world's biggest retail market in 2019. According to the report, the sale boom is a result of China's rising incomes and thriving e-commerce. The report says China will overtake US in 2019 and total retail sales will grow 7.5% to reach 5.636 trillion USD in 2019, while US will grow 3.3% to 5.529 trillion. One- fifth of the country's total sales in 2018 was from e-commerce which is a major driver of China's retail economy. As PER predictions US share of the global e-commerce market is expected to drop to 15 percent by 2022. By the end of 2019, China will have 55.8 percent of all online retail sales globally which is also expected to exceed 63% by 2022.