Providing visa guidance

I need to give general guidance on US visas, covering things like the DS-160, background checks, and potential security flags. It’s important to clarify whether the user wants a policy summary or practical advice for their visa prep. I’ll provide concise bullet points detailing the necessary documents, common refusal grounds, and tips like applying early and showing strong ties. Additionally, I must remember that each decision is made individually, especially during high-volume events.Clarifying travel requirements
I need to ask the user about their passport and which host country they'll be traveling to, like the US, Canada, or Mexico, and if they have any prior refusals. I'll provide immediate answers about Canada, mentioning the eTA and its recent expansion, which includes some passport holders but not China. As for Mexico, they have an electronic authorization system for some nationalities; Chinese citizens can enter Mexico visa-free if they have a valid US visa.Summarizing visa policies
Mexico allows entry without a visa for travelers holding a valid US visa, or valid visas from Canada, the Schengen Area, the UK, or Japan—this includes Chinese citizens. However, Canada requires a visa for Chinese travelers, and having a US visa won't necessarily waive that. In general, I want to keep the focus on US policy, noting that the US will screen all visa applications individually.
To summarize in Chinese:

不会因为“去看世界杯”就被一刀切拒签。白宫官员强调“签证关乎国家安全”,意思是审理会按既有安全与移民法规逐案把关,而不是对“球迷”这一群体做集体性限制。大型赛事期间通常会更细致审查、名额紧张,但原则不变。
实操要点(以赴美B-2旅游签为例,2026年赛事在美/加/墨分散举办):

如果你能提供护照国别、计划观赛城市/赛程、是否有过美签/拒签史,我可以给出更具体的材料清单与时间线建议。