Visitor Visa Refusal (false representation as did not declare alternative name, dual nationality with a T4 visa)
My son is 12 years old, he was born in Canada. He is holding a Valid T4 Visa and BRP card. But recently I applied a Chinese passport for him with an alternative name and alternative birthday.
I used his Chinese Passport to apply for UK Visitor Visa recently which was refused. On the application, I did not declare his Canadian passport information as China is not allowed Dual citizenship. Also, on his Chinese passport, his birthplace is China (the only way I can apply for his Chinese citizen was to declare he was born in China).
Refusal reason and letter please kindly refer to attachment. 
Due to COVID-19, China revoked all Foreigner's visa to enter China, that's why I want to use a Chinese passport to let my son freely leave and return to China(all my family in China). I am deeply worried that next time when he arrives at Heathrow Airport, the Border Control offer will not let him entering UK with his Canadian Passport and BRP card. Moreover, I am worried about his next T4 Visa renewal (July 2021) will be refused. Is there anything I can do to avoid that?
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Do embassies know about visa refusal in other countries?
The embassy doesn't track your refusal, CLASS does. That's a database accessible to every American consular officer in the world at the click of a mouse, so it's not just the embassy where the visa refusal takes place.What happens if you lie on a UK visa application?
Even if your visa is granted, if you have provided false information on your visa application form you can be refused entry to the UK at the border and banned from entering for up to ten years.What happens if you make a mistake on your visa application?
Mistakes on application form can be disastrous. If the mistake is interpreted by officials as an attempt to mislead or deceive, the application must be refused. If the application is for an entry clearance, it will also lead to a 10 year ban on re-entry.How do you answer Have you ever been refused a visa?
Have you ever been refused a U.S. Visa, or been refused admission to the United States, or withdrawn your application for admission at the port of entry? You have to answer \u201cYES\u201d if your US visa has been denied at the US embassy. You have to answer \u201cNO\u201d if the denial was made by USCIS and not the US embassy.Not disclosing previous visa rejections | How previous visa refusal impacts your profile?
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Images: Nataliya Vaitkevich, Michael Burrows, Pixabay, Porapak Apichodilok