Foremost

Will elaborate on several convenient technics here. Order is not of particular importance. Will disclose in any order.

Further, the contents may not correspond with the title and may be misleading. Maybe biased to a particular philosophy and so take care.

Have also elaborated in the Cautions（Must read）section, cannot guarantee specifications and quality. When system is different, the range of tolerance will change and customization maybe required so this is just for reference