According to the interest rate parity theory, spreads determine changes in exchange rates. At this stage,Under the expectation that the Fed will raise interest rates and superpose the People’s Bank of China for lowering standards, the pressure for RMB devaluation will be high. Raising the gross margin, the same amount of RMB items will be denominated in US dollars and will be lower than the pre-devaluation quota, making China’s international engineering projects more attractive. For currency-type subjects such as foreign currency cash and cash equivalents, devaluation of RMB will generate a certain exchange gain. Beijing Great Pack Company as an export enterprise of the fire sleeve , Will definitely keep up with the times, sale the fireproof sleeve ,silicone rubber fiberglass sleeve to all over the world , For the high temperature protection business to contribute their own strength.