NUSA DUA, Indonesia — Secretary of State John Kerry replaced President Obama at the opening of the Asia-Pacific Economic Cooperation meeting on Monday, leaving China’s president, Xi Jinping, as the dominant leader at a gathering devoted to achieving greater economic integration.

Mr. Xi, the keynote speaker, delivered a long, tightly scripted speech that made no reference to Mr. Obama and concentrated on the theme of Chinese economic overhaul at home, and the need for China to have the Asia-Pacific region as a partner abroad.

“China cannot develop in isolation of the Asia-Pacific, and the Asia-Pacific cannot prosper without China,” Mr. Xi said.

The absence of Mr. Obama, who canceled to try to resolve the government shutdown in Washington, was repeatedly noted at the conference, held in this enclave of international resorts on the Indonesian island of Bali. But Mr. Kerry, for his part, made light of his role as the stand-in.