Above what amount must government investment projects use open tendering? Is the use of invitation to tender or open tendering arbitrary below the standard amount? On these two

The country has a limit standard, each province has its own limit standard, but then must tender standard, with whether open/invitation has nothing to do;

Open/invitation of the difference is the nature of the funds, the government investment projects are certainly must be open tendering, unless two consecutive announcements of the number of bidding units are less than three, after requesting the approval of the original approval unit can be not tendered;

Government investment projects are subject to the Bidding and Tendering Law, and government investment goods and services projects are subject to the Government Procurement Law.