China's HNA to tap M&A brake after $50 bln deal splurge

(Corrects fifth paragraph to remove reference to last week and paragraph 21 to say Avalon is an aircraft leasing company, not operator)

* HNA acquisition pace to slow this year

* More than $50 billion in deals since 2015

* Some group companies wrestling with pace of growth

* Focus on key sectors, including financial services

* Over 50 pct of revenue, 30 pct of assets outside China

By Matthew Miller

BEIJING, June 5 (Reuters) - After two years of aggressive deal-making - from buying stakes in Deutsche Bank and Hilton Worldwide Holdings Inc to taking over electronics distributor Ingram Micro - Chinese conglomerate HNA Group intends to slow the pace, or at least the size, of its acquisitions overseas.

A sprawling aviation-to-financial services group, HNA has emerged as China's most active non-government player in global markets, with deals worth more than $50 billion - equal to the annual GDP of Bulgaria.

"This year, the merger and acquisition pace will slow a little for sure," Adam Tan, HNA Group CEO, told Reuters in a rare media interview.

Political uncertainty in the United States and Europe - such as the upcoming negotiations on Britain's departure from the European Union - and China's broad crackdown on capital flight from the country, have changed the climate for HNA's unbridled growth.

"It's a bit more complicated than before," Tan said by phone.

Tensions between China and the United States are the biggest risk, said Tan, who received an MBA from St. John's University in New York and studied at Harvard Business School.

His comments come amid increasing debate about the United States expanding its vetting process on foreign investment, and tensions over its trade deficit.

"This is a critical relationship," Tan said. "No good can come from fighting. We can disagree, we can talk, we can negotiate - that's a family issue. We're not enemies."

For HNA, which has accumulated assets even as other Chinese companies find it more difficult to acquire overseas, any pivot in strategy may bring the group more into line with government policy aimed at reducing the amount of money leaving China. It would also give it more opportunity to digest and rationalize the assets it has bought using often complex bank borrowing and debt arrangements.

Tan spoke to Reuters at a time when HNA's financing and ownership structure has come under intense scrutiny.

In three years, the group has more than quadrupled its assets, to 1.2 trillion yuan ($176.12 billion) at the end of last year from 266 billion yuan at the end of 2013.

"The scope of their ambition, the speed of these acquisitions, the enormity of the credit resources at their disposal has put HNA in a different league, where the normal rules of business don't seem to apply," said William Kirby, a professor at Harvard Business School who has authored a case study on the group.