The United States refused to issue a visa

First, the visa officer asks you the purpose of going to the United States, and your answer should be to answer the main reason first and then the secondary reason. Or directly answer the main reason: "the purpose of my visit is to meet my husband, because he misses me very much." It's better to ask your husband to send you an invitation letter from Canada or the United States, explaining the reason for inviting you, and hand it over to the visa officer in person.

The visa officer asked your husband when he was in America? Your answer should be "Yes, let's meet in America." So the visa officer may not ask your husband any more questions. If you keep asking questions, please explain again, "My husband is studying in Canada, and he really wants to invite me to travel to the United States, so I applied for a visa to travel to the United States, so that I can travel with him in the past."

Third, and most importantly, you need to provide all the proofs of your assets in China as much as possible, prove that you have enough assets in China as much as possible, and dispel the idea that the visa officer thinks you are inclined to emigrate. For example, your bank account deposit, on-the-job and leave certificate are all signed by the leaders, and you have the intention to guarantee to return to China on time. And a copy of the business license of the enterprise. You can also get your own income certificate in China. Just do it yourself, and try to write your income.

Fourth, during the interview, mention as much as possible that you will return to China on time, saying that domestic enterprises cannot live without it for too long, and you need to return to China as soon as possible.

That should be enough.

You can also mention that all your relatives and friends are in China, including that you have a 2-year-old son. Anyway, the more you mention that you have a good and stable job in China, and all your social circles are in China, unless the visa officer thinks you have an immigration tendency, you will pass!