China's slowing economy and market rout may be capturing headlines, but the root problem is the mainland's massive debt load, top China banking analyst Charlene Chu, told CNBC.
"We need more focus on this debt problem in China because that really is what's at the root of everything," Chu, who is senior partner at Autonomous Research Asia, told CNBC's Squawk Box. "The market is nervous because we've got a debt problem that the authorities aren't addressing."
Chu said China's debt boom may even be the world's biggest in such a short period of time.
"The size of banking sector assets has gone from $9 trillion in 2008 to $30 trillion at the end of 2015," she said, noting that most of these borrowings went to the corporate, not the household, sector.
A lot of that debt went toward assets that aren't performing, she added.