以下是官方的说法:The Embassy or Consulate at which you actually apply should be able to access your form using the barcode on your DS-160 confirmation page， which you must bring to the visa interview. For example， a business traveler intenDS to apply for his visa at the U.S. Embassy in City X， so he selects City X as the location where he will submit his application when he completes his DS-160. He then has an urgent reason to travel to City Y on business. Because there is a U.S. Consulate in City Y， he schedules an appointment for a visa interview there， using the barcode from his completed DS-160 application for appointment scheduling. The U.S. Consulate in City Y is able to accept his DS-160 even though it lists the U.S. Embassy in City X as the location where he originally intended to submit his application.
小绿妈近期后台收到不少家长咨询，距离第一波拿到10年美国签证，即将到期了！我们美宝家长之前获得过美国签证，多数为旅游签证B1/B2。美签续签其实和美签初次申请的流程相似，我们需要到US Visa Information 的页面办理：01到期前后多久可以续签呢？
