A Chinese company has dropped a bid, subject to a European Commission investigation, for a public contract for electric trains in Bulgaria, the EU executive arm announced on Tusday. The European Union’s market “is open for firms that are truly competitive and play fair,” EU Internal Market Commissioner Thierry Breton said in a statement in praise of the outcome. The commission announced an investigation in February into a bid from CRRC Qingdao Sifang Locomotive Co. Ltd, a Chinese company, for a public contract in Bulgaria for electric trains. The investigation was launched to find out if publi…