BEIJING—China’s Guangdong province on Friday summoned the chairman of China Evergrande Group after the real estate developer said there was “no guarantee” it would have enough funds to meet debt repayments, while regulators sought to reassure markets. Evergrande, once China’s top-selling developer, is grappling with more than $300 billion in liabilities, fuelling fears of a potential collapse that could send shockwaves through the country’s property sector and beyond. On Friday, the company said in a filing to the Hong Kong stock exchange it had received a demand from creditors to pay about $260 million. It is already late paying $82.5 million in coupons due on Nov. 6. “In light of the current liquidity status … there is no guarantee that the group will have sufficient funds to continue to perform its financial obligations,” Evergrande said, adding that creditors may demand accelerated repayment if it does not. That prompted the government …