Sixteen Chinese military aircraft were detected on Monday entering the airspace over Malaysia’s exclusive economic zone in the disputed South China Sea. Wisma Putra said it will summon China's ambassador to relay “Malaysia’s serious concern”, while his ministry will lodge a formal diplomatic protest. With China as a major investor in strategic projects, what constraints are there in Malaysia’s diplomatic and military playbook? Melisa Idris and Sharaad Kuttan speak to Ivy Kwek, Research Director, REFSA.