Chinese President Hu Jintao kicked off his trip to the United States\u00a0on Tuesday with a visit to Microsoft\u2019s campus in Redmond, Wash., and dinner at the home of Bill Gates, the company\u2019s chairman and chief software architect.During his visit to Microsoft\u2019s campus, Hu assured Gates that China is committed to protecting intellectual property (IP) rights, China\u2019s state-run media reported. He also told Gates that China welcomed further investment from Microsoft, the reports said.IP infringement, including software piracy, is a big source of friction between China and the United States. More than 90 percent of software used in China is unlicensed, according to a U.S. government estimate. In a bid to soothe U.S. concerns, the Chinese government has pushed PC makers to pre-install copies of licensed software on the computers they produce.One day before Hu\u2019s arrival in the United States, Microsoft and Lenovo Group, China\u2019s largest PC maker, inked a US$1.2 billion deal to install licensed versions of Microsoft\u2019s operating system on PCs sold in China and other countries. Microsoft signed similar deals with two other Chinese PC makers earlier this month.Following his tour of Microsoft\u2019s campus and a visit to a local school, Hu was a guest for dinner at the Gates home. The dinner was attended by about 100 guests, including former Washington Gov. Gary Locke, a prominent Chinese-American politician, China\u2019s media reported.Hu\u2019s visit to Microsoft had originally been planned for last year but was postponed following Hurricane Katrina, which devastated large areas of the U.S. Gulf Coast.His current U.S. trip is part of a five-nation tour that will last until April 29 and include stops in Saudi Arabia, Morocco, Nigeria and Kenya. He will meet with President Bush on Thursday in Washington, D.C., for talks that are expected to focus on a range of issues, including bilateral trade, North Korea and Iranian efforts to acquire nuclear weapons.-Sumner Lemon, IDG News ServiceFor related news coverage, read Why Piracy Isn\u2019t Going Away in China and Copyright Group: China Talks Yield \u2018Modest\u2019 Success.This article is posted on our Microsoft Informer page. For more news on the Redmond, Wash.-based powerhouse, keep checking in.Also, have a listen to CIO Publisher Gary Beach\u2019s podcast on Microsoft\u2019s upcoming operating system, Vista, as well as the topic of open source.Check out our CIO News Alerts and Tech Informer pages for more updated news coverage.