(1) Inadequate geological exploration, insufficient amount of proven reserves, narrower or shorter scattered mineral veins which are not suitable for large-scale mining;

(2) Mine owners lack sufficient funds to invest in medium and large-scale mines and have to make profits from small-scale mining and processing;

(3) The access to mines is inconvenient, making it difficult for transportation of large-scale heavy equipment and materials and electric power supply;

(4) Fails to support contiuous operation due to the lack of water resources;

(5) There are artisanal and small-scale miners who use outdated equipment or techniues like spiral chute and amalgamation to recover gold, which is of low efficiency and low recycling ratio and bad for workers' health and thr environment;

(6) After a few months or just one to two years' mining in one are, some mine owners would prefer relocating their plants than re-investing in the same mine;

(7) Small-scale mine owners, in the hope of recovering gold with the best solution, will establish a processing plant as quickly as possible and reduce as many complex yet necessary precedures as possible;

(8) Many small-scale miners expect in local area a small-scale processing plant to which they can sell their raw materials for processing, thus making more profits than using outdated techniques themselves;

(9) Worried about the huge economic loss of building a medium-and-large size processing plant, many mine owners will pilot a small size one for economic evaluation and final decision;

(10) Some previous-processed tailings still contain valuable gold. Miners hoping to minimize their investments and establishing a small-scale processing plant quickly will therefore reduce production cost by recycling gold in such tailings.

• Making the best of mineral resources and ensuring a high recycling rate and economic benefits;
• Advanced technologies and techniques are adopted to completely get rid of mercury and other poisonous chemical substances, thus protecting workers health and environment, reducing labor intensity, and improving production efficiency;
• Lower consumption of energy, water, and raw materials, reduced need of operators, investments and production costs;
• Fast installation, easy reliable operation, maximizing the recovery of gold by the flexible combination of different functional modules.
• Fewer requirements for civil engineering, shortening the project's lead time
• Easy to be containerized, transported, and re-assembled even in the remotest corner of the world.