美國司法部門官方文件表示....
是B-1簽證沒錯

http://www.justice.gov/usao/mow/news2011/liu.com.html




Once in the United States, the affidavit says, Liu paid the Filipino worker $400-450 per month, although the employment contract stipulated a salary of $1,240 per month. Liu allegedly required the victim to work six days a week, 16 to 18 hours a day, and forbid her to leave the house without permission. Under the terms of her employment contract, the affidavit says, she was to work no more than eight hours a day, 40 hours per week, and her presence was not required inside the residence except during working hours.


簽$1240, 給$400-$450...