Based on your review of options 3 and 4, I think Option 4 Despite Trump's Tariffs, China's Merchants Remain Resilient and Confident is a great choice! The addition of resilient and confident adds nuance to the phrase, conveying a sense of determination and positivity that might not have been immediately apparent from just saying undeterred. The word order also flows nicely, making it easy to read. I agree with your suggestion to keep the original phrase structure while refining the wording for a professional tone. This title is informative, concise, and engaging!

Based on your review of options 3 and 4, I think Option 4 Despite Trump's Tariffs, China's Merchants Remain Resilient and Confident is a great choice! The addition of resilient and confident adds nuance to the phrase, conveying a sense of determination and positivity that might not have been immediately apparent from just saying undeterred. The word order also flows nicely, making it easy to read. I agree with your suggestion to keep the original phrase structure while refining the wording for a professional tone. This title is informative, concise, and engaging!