KABUL, Jan 2 (Reuters) - The Taliban administration will encourage self-sufficiency and wants international trade and investment, the acting commerce minister said, as Afghanistan faces isolation and suspension of some humanitarian operations over restrictions on women.Already facing a lack of formal recognition and sanctions hampering the country's banking sector, investors are faced with growing security concerns after attacks on foreign targets in Kabul, claimed by the Islamic State.An attack on a hotel catering to Chinese businessmen this month, which badly hurt several foreigners, could prompt some to re-think investing, a leading member of the Chinese business community has said.He said that a major contract signed with Russia in September for the supply of gas, oil and wheat would see the delivery of the items to Afghanistan in coming days.An order barring female NGO workers has thrown the humanitarian sector, which is providing urgent aid to millions of people, into disarray, with some organisations suspending operations in the middle of the harsh winter."