SHANGHAI—The president of China’s Bank of Communications Co. Ltd. (BoCom), on Friday warned it will be difficult for the lender to deliver satisfactory earnings this year. “This year has been the most complex year in my nearly 30 years in this business,” bank president Liu Jun told a news conference following BoCom’s annual results. Liu cited challenges including a surge of COVID-19 cases in China, the conflict between Russia and Ukraine, and its impact on supply issues, inflation, and other domestic difficulties. COVID-19 is currently spreading in a number of China’s largest cities, such as Shanghai and Shenzhen, leading to partial lockdowns of airports, districts, and inter-province travel. Other difficulties the country is facing include the Chinese regime’s crackdown on the property sector, which has led to near-defaults by a number of developers. The bank reported a full-year profit rise of 11.9 percent on Friday, beating estimates. China’s sixth largest …