  Achieving the expansion of domestic demand and the economic internal
circulation requires balanced and coordinated support from multiple industries
(domains) such as consumption, education, entertainment, engineering
infrastructure, etc., which is indispensable for maintaining economic
development. Metaverse applications may help with this task and can make many
industries more interesting, more efficient, and provide a better user
experience. The first challenge is that metaverse application development
inevitably requires the support of various artificial intelligence (AI)
technologies such as natural language processing (NLP), knowledge graph (KG),
computer vision (CV), and machine learning (ML), etc. However, existing
metaverse application development lacks a lightweight AI technology framework.
This paper proposes a flexible metaverse AI technology framework metaAID that
aims to support language and semantic technologies in the development of
digital twins and virtual humans. The second challenge is that the development
process of metaverse applications involves both technical development tasks and
manual editing work, and often becomes a heavyweight multi-team collaboration
project, not to mention the development of metaverse applications in multiple
industries. Our framework summarizes common AI technologies and application
development templates with common functional modules and interfaces. Based on
this framework, we have designed 5 applications for 3 industries around the
expansion of domestic demand and economic internal circulation. Experimental
results show that our framework can support AI technologies when developing
metaverse applications in different industries.
