1. Avoid excessive yin in the environment: Liu Yin's homonym is Liu Yin, which means auspiciousness and wealth gathering. In Feng Shui, if you put it in a place with too much yin, the aura of Liu Yin will change. 2. Avoid too dry environment: too dry environment is not suitable for placing silver willows. On the one hand, if we put silver willows in a normal growth environment, if they are placed in a too dry environment, they naturally like humidity. 3. Avoid direct sunlight: Silver willow is a plant that likes sunlight, but it needs proper illumination, and it is not suitable for excessive direct sunlight, otherwise it will lead to dehydration and death.

Nano-robot is a new technology in robot engineering. The development of nanobots belongs to the category of "Molecular Nanotechnology (MNT)". Based on the biological principle at the molecular level, it designs and manufactures "functional molecular devices" that can operate nano-space. The idea of nano-robot is to apply biological principles on the nano scale, discover new phenomena and develop programmable molecular robots. Synthetic biology redesigned the cell signal transduction and gene regulation network, and developed an "in vivo" or "wet" biological computer or cell robot, thus producing another way of nano-robot technology.