Singapore and Vietnam ramped up their business ties, signing off on a string of new collaborations in banking, power generation and infrastructure on the third day of an official visit by Singapore Prime Minister Lee Hsien Loong. <br/><br/>At a joint news conference with Vietnam's Prime Minister Nguyen Xuan Phuc today, Mr Lee said economic ties are strong and the two countries are taking their strategic partnership forward. Both sides have agreed to further discuss liberalising bilateral air services to boost connectivity.