Yes, Guoyuan Futures can establish K-line charts in different time periods according to the regulations of the exchange. K-line chart is a commonly used technical analysis tool in financial trading markets such as stocks and futures. It helps traders to analyze market trends and formulate trading strategies by displaying information such as opening price, closing price, highest price and lowest price in a certain period of time. Common K-chart time periods are 1 minute, 5 minutes, 15 minutes, 30 minutes and 60 minutes. However, it should be noted that whether to support the 8-minute K-line chart depends on the regulations and support level of the exchange where Guoyuan Futures is located, because the exchange may have its own time period rules. I suggest you consult the customer service of Guoyuan Futures, or refer to the official documents to get the most accurate information.