China must prepare for difficult times as the international situation is increasingly complex, President Xi Jinping says in comments carried by state media, as the country faces increased tariffs in a bitter trade war with the US.
The two countries are locked in tit-for-tat tariff increases on each other's imports after talks broke down to resolve their dispute.
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During a three-day trip this week to the southern province of Jiangxi, one of the cradles of China's Communist revolution, Xi urged people to learn the lessons of the hardship of the past.
"Today, on the new Long March, we must overcome various major risks and challenges from home and abroad and win new victories for socialism with Chinese characteristics," state news agency Xinhua paraphrased Xi as saying.
"Our country is still in a period of important strategic opportunities for development, but the international situation is increasingly complicated," he added.
"We must be conscious of the long-term and complex nature of various unfavourable factors at home and abroad, and appropriately prepare for various difficult situations."
The report did not elaborate on those difficulties, and nor was there a direct mention of the trade war or of the United States.
Xi also talked about the importance of technology, and "emphasised that technology innovation is the lifeblood of companies".
"Only by having indigenous intellectual property and core technology can products possessing core competitiveness be produced, and only then can an invincible position be attained amid fierce competition."
China must master more core technologies and seize the "high ground" in industrial development, he added.
Xi visited a rare earths firm too, sparking speculation the sector could be the next front in the Sino-US trade war.
Xi learned in detail about China's rare earth resource situation, exploitation techniques, applications, and environmental protection measures, Xinhua said.
"Rare earths are important strategic resources, and are non-renewable resources."