What does a simple and small-scale construction contract in Vietnam mean?

Point dd, Clause 2 Article 1 of Decree 50/2021/ND-CP stipulates:

A simple and small-scale construction contract in Vietnam is a construction contract for the performance of a contract package with a value not exceeding the limit on a small-scale contract package in accordance with regulations of law on bidding. The contents of the contractual work are of a simple technical nature and easy to be conducted.

Additionally, the Decree also stipulates:

A contract for engineering and procurement of materials and equipment in Vietnam (Engineering – Procurement abbreviated as EP in English) is a contract for engineering and for procurement of materials and equipment to be installed in construction works according to the technological design; general contract for engineering and for procurement of materials and equipment that is a contract for engineering and for procurement of materials and equipment for all works of a construction project.

Sincerely.