Its debts and lack of transparency over ownership and financing have drawn scrutiny among international bankers and some regulators. CEFC last year agreed to buy a $9.1 billion stake in the Russian oil major Rosneft.
Here is a look at the private finance-to-energy conglomerate's sprawling global assets from the Czech Republic to Chad to the United Arab Emirates:
CZECH REPUBLIC:
--In March 2016, agreed to raise its stake in the Czech-Slovak J&T Finance Group to 50 percent from 9.9 percent for 980 mln euros ($1.04 bln).
The European Central Bank gave the green light for the deal last September, but the Czech National Bank last month rejected the transaction in an initial ruling because of a lack of information about the origin of the funding for the deal.
--Owns stakes in brewery group Lobkowicz (>> Pivovary Lobkowicz Group as) and football club Slavia Praha.
--Owns 49.9-percent stake in airline Travel Service. Travel Service this week announced it was raising its stake in the national carrier Czech Airlines to nearly 100 percent.
--CEFC and Penta Investments, a Czech-Slovak financial group, have made a joint bid for Time Warner Central European Media Enterprises.
--Owns the Mandarin Oriental Hotel, Le Palais hotel, the Florentinum office complex, and another historical building, formerly known as Zivnobanka, all in downtown Prague.
--In August last year, acquired Zdas, a Czech producer of machine tools.
ENERGY ASSETS:
--Agreed last September to acquire 14.16 percent stake in Russian oil major Rosneft (>> NK Rosneft' PAO) for $9.1 billion. Executives say deal likely to close in the first half of this year. CEFC plans to raise $5.1 billion from Russian bank VTB for bridge loans and was in talks with China Development Bank to refinance the short-term credit from VTB.
--Since start of 2018, has been a major marketer of Russian crude oil after winning an annual supply deal with Rosneft to buy some 12 million tonnes of Russian oil.
--Won in February 2017 a 4-percent stake for $900 million in a giant onshore field majority-owned by Abu Dhabi National Oil Co (ADNOC).
--Agreed in February 2017 to take a 25-percent stake in a $566 million crude oil terminal, storage project in east China.
--Signed a deal in December 2016 with KMGI, a unit of the Kazakh state oil and gas firm KazMunayGaz
--Operates a 17.6 million-barrel oil reserve facility in Yangpu on Hainan, CEFC's first major domestic oil asset.
--Has a 3.8 million barrel storage site in Rizhao, Shandong.
--Plans a 63-million barrel storage facility in the United Arab Emirates in a joint venture with Abu Dhabi National Oil Company.
--Bought a 35-percent stake in oil and gas blocks in Chad from Chinese Petroleum Corp of Taiwan for about $110 million.
--Agreed with Russia's Gazprom in July 2015 to invest three oilfields in the Baikal project in East Siberia.
--Plans to build a petrochemical complex in South China using liquefied petroleum gas and condensate to make petrochemicals, local media reported last November.
FINANCIAL SECTOR:
--Scrapped deal to buy 20-percent stake in the U.S. financial services company Cowen due to delays and uncertainty in securing approval from the Committee on Foreign Investment in the United States.
--Plans to launch in 2018 its own bank with a registered capital of 5 billion yuan.
(Compiled by Chen Aizhu; Editing by Josephine Mason and Philip McClellan)