iain duncan smith
Cross-party opposition includes 40 Conservatives and former Labour leader Jeremy Corbyn.
The move came in retaliation to sanctions imposed by the UK, US, EU and Canada on Beijing for alleged human rights abuses.
PM's majority slashed to 18 as MPs vote against amendment to block agreements with countries implicated in genocide.
Furious rebels accuse PM of “cynical manipulation” as Johnson's majority is slashed to just 15.
Rebels led by Iain Duncan Smith have failed to force the government to outlaw trade deals with countries committing atrocities.
Exclusive: Less than a quarter of Tory MPs on Twitter and just five cabinet ministers post in support of “the prittster” - Lib Dem analysis.
Former Tory leaders Theresa May and Iain Duncan Smith and ex-minister Steve Baker were among the 55 rebels who refused to back the government.
The former minister said the country was "impersonating the Grand Old Duke of York".
Former cabinet ministers join Labour in urging "immediate" support.
PM plans to hand Chinese firm key role in building UK network.