This is a commercial transaction between Chinese tech companies and Vietnam with zero US constitutional impact. No mechanism specified, no US government action involved. Event occurs entirely in foreign jurisdiction involving foreign entities making business decisions. US tariffs mentioned as background context but no direct constitutional mechanism engaged. A-score=0 (no drivers triggered, no constitutional damage pathway). B-score=10.1 (modest media appeal around US-China tech competition narrative but low overall hype). Clear noise: foreign commercial activity with tangential US policy mention.