BEIJING, Aug 23 (Reuters) - China"s foreign trade may face a more complicated situation next year given base effects and receding positive factors associated with the global COVID-19 pandemic, Wang Wentao, the country"s Commerce Minister said on Monday. Foreign trade already faces a complex situation in the second half this year, Wang told a news conference in Beijing. China"s cross-cyclical macoeconomic policy will help economic fluctuations stay within a reasonable range, Wang added.