Why can't I work in Macau after I have been to Southeast Asia many times?

The reason why I can't work in Macau Southeast Asia for many times is that I have to hold a labor visa to work in Macau. Visa system is a symbol of national sovereignty and a concrete embodiment of a country's control and management of the entry of citizens of other countries, so as to achieve the purpose of safeguarding national security and domestic social order. A labor visa needs to obtain labor information, apply for a passport, conduct a simple physical examination, prepare the materials to be used, and according to the requirements of different countries, some have to prepare a certificate of innocence, and sign one or more contracts, pay the fees, and submit the corresponding materials for review. Labor service abroad, also known as labor export, refers to the provision of labor services or services by labor exporting countries (exporting countries) to labor importing countries (importing countries) in order to seek economic benefits and obtain foreign exchange income. Labor service abroad can be said to be an intangible labor service trade. Labor service abroad includes a wide range of contents, mainly including management and services such as construction engineering, service industry, computer and telecommunications, insurance, banking, tourism, leasing and advertising consulting.