Explanation:

 Oil Block 128 is the oil block that was given on lease to ONGC Videsh Limited (OVL) for oil explorations in South China sea by Vietnam. The Oil Block 128 is part of 9 dash line of China, the region claimed by China in South China Sea. The Block was recently in news as Vietnam has renewed the Vietnam-India Oil Deal and extended for another period of 2 years. India has been a strategic partner of Vietnam and provides naval patrol boats, satellite cover, training for submarines and fighter pilots to Vietnam. India is currently providing more aid to Vietnam than it does to any other country in South East Asia.