China's economy grew by 6.9% in 2015, compared with 7.3% a year earlier, marking its slowest growth in a quarter of a century.
China's growth, seen as a driver of the global economy, is a major concern for investors around the world.
The news comes as the International Monetary Fund said it expected China's economy to grow by 6.3% this year and 6% in 2017.
Yellen, addressing House lawmakers, said the central bank's policy-setting committee does not expect a very steep path of rate hikes that harms the housing sector, once the tightening begins
A gauge of United States business investment plans fell slightly in August, while the number of Americans filing new applications for jobless benefits barely rose last week. Both reports were taken as signs that global headwinds were doing little to impede American economic growth.
The Canadian economy has entered recession, official figures have shown.
Gross domestic product (GDP) fell by an annualised rate of 0.5% between April and June.
That follows a contraction of 0.8% in the first quarter, meaning the economy has seen two consecutive quarters of negative growth, the usual definition of recession.
UK interest rates are kept unchanged again by the Bank of England, meaning they have now been at their record low of 0.5% for six years.
The Russian economy contracted by 0.5% in November, the first fall in national output - Gross Domestic Product - since October 2009, official figures show.
Retail expert Mary Portas has accused the government of making "token gestures" to rejuvenate Britain's struggling high streets.
As a result of her review three years ago, 27 areas were given funding to build more diverse town centres - but the results have been mixed.
Ms Portas has now called for faster action on "crippling" business rates and for local councils to be given the power to take control of empty shops.
Commons Leader William Hague has said legislation affecting just England should only be passed "with the consent of the majority" of English MPs.
He announced four options for "English votes for English laws" in Parliament, including giving English MPs enhanced scrutiny and a veto over new laws.
He said new arrangements for England were a "fundamental issue of fairness".
The Bank of England's doomsday economic scenario has left three of Britain's major banks under some stress.
But only one, Co-op, has actually failed the test of what would happen if there were an economic crisis in the UK.
The bank, which faced its own crisis in 2012 when its efforts to buy 600 Lloyds Bank branches collapsed, has been told to cut its balance sheet by selling assets.
For Lloyds and RBS the results of the stress tests were tough but not as gloomy.
A premature interest rate rise could present a "huge risk" to the British economy, the British Chambers of Commerce (BCC) has warned.
The business lobby group said the UK's dependence on consumer spending and mortgages meant it was "particularly sensitive" to interest rates.
The warning came as the BCC trimmed its growth forecast for 2014 to 3% from 3.2% and for 2015 to 2.6% from 2.8%.
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