My name is Mark Lee. I am a Chinese citizen currently without legal status in Canada. My Canadian spouse unfortunately passed away recently. I would like to inquire about my eligibility to apply for permanent residency through spousal sponsorship, specifically under the widow(er) sponsorship program. I am seeking guidance on the application process, required documents, potential challenges, and any possible alternative immigration options available for my situation. Thank you very much for your assistance. I look forward to your reply. Best regards,