1. Customer service hotline: Find official website or APP of Oriental Fortune and find its customer service hotline. You can contact their customer service team directly by calling this number.

2. Customer service e-mail: Look for the customer service e-mail provided by Oriental Fortune official website or APP, and you can send them an e-mail explaining your problems and needs in detail. Their customer service team will reply to you as soon as possible.

3. Online customer service chat: Some financial apps or websites may provide online customer service chat. You can try to communicate with the customer service representative of Oriental Fortune in real time through this function and ask your questions. Oriental Fortune is a leading financial information service provider in China, focusing on providing diversified financial data, research reports, investment tools and online trading platforms for investors and financial institutions. Stamp duty is a tax levied on specific financial transactions or legal documents, which is usually collected by the government.