Illegal. According to the inquiry of China Travel Service. Com, it is illegal for domestic institutions to trade foreign exchange, precious metals, futures, indexes and other products (including cross-border) through various network platforms such as Internet websites, mobile communication terminals and application software without the approval of the financial supervision department of China, while overseas institutions provide foreign exchange, precious metals, futures, indexes and other products to domestic customers through various network platforms such as Internet websites, mobile communication terminals and application software without the approval of the financial supervision department of. At present, there is no legal basis for setting up an online platform (including cross-border) for leveraged trading of foreign exchange and precious metals in China, and the financial supervision department has never approved it. The online platforms for the above-mentioned trading business are all illegally established, and the rights and interests of both parties to such platforms are not protected by law.