VICE President Kamala Harris starts a weeklong trip to Africa this weekend as the United States seeks to pitch itself as a better partner than China, which has invested heavily in the continent over several decades. Harris will discuss China's engagement in technology and economic issues in Africa that concern the United States, as well as China's involvement in debt restructuring, senior U.S. officials said. One of the three countries Harris will visit is Zambia, which was the first African country to default on its sovereign debt during the COVID-19 pandemic, and is working with its creditors, including China, to reach an…