我是新手上路，关于H-1B 回国大家都说需要签证，我在USCIS网页上看到如下回答，也没说用签证呀。另外，此中国护照和加拿大护照对H-1B有何区别吗？多谢解惑！！
Can an H-1B alien travel outside the U.S.?
Yes. An H-1B visa allows an alien holding that status to reenter the U.S. during the validity period of the visa and approved petition.
Can an H-1B alien intend to immigrate permanently to the U.S.?
Yes. An H-1B alien can be the beneficiary of an immigrant visa petition, apply for adjustment of status, or take other steps toward Lawful Permanent Resident status without affecting H-1B status. This is known as "dual intent" and has been recognized in the immigration law since passage of the Immigration Act of 1990. During the time that the application for LPR status is pending, an alien may travel on his or her H-1B visa rather than obtaining advance parole or requesting other advance permission from Immigration to return to the U.S.