North Korea has increasingly used the nuclear brinkmanship in a bid to be taken seriously. On Sunday, North Korea announced that it had tested the hydrogen bomb and the announcement came at a time when China was hosting the BRICS summit. Experts we spoke with say that these latest tests go beyond the concept of being taken seriously by the United States. It is also aimed at embarrassing China. North Korea's tests have increasingly put China is a spot of bother and caused a great deal of embarrassment.