Which American consulate in China can prove that foreigners are single?

Hello, at present, all four American consulates in China can apply for the single oath.

It should be noted that you must make an appointment before entering the US consulate:

At present, American embassies and consulates are located in Beijing, Shanghai, Guangzhou and Shenyang. To enter the embassy or consulate, you must make an appointment at the American Consulate in official website.

The steps are simple: select the corresponding country and city and the business you want to handle. Register personal information, submit confirmation, and you can make an appointment. As shown in the figure below:

Besides,? I wonder if the subject intends to apply for marriage immigration after taking the single oath? If so, after obtaining the single certificate, foreigners who are married to China citizens need to go to the foreign marriage registration office where their household registration is located. If the subject wants to know more about marriage and immigration, please write privately.