Because the true-mood parts' self-design integrates the whole set and has low frequency in empoldering.and the Sofa has high frequency in empoldering products independently with lots of items.Considering the difference above,the Sofa product's code just follows "MDC" by MeiKe designing Centre,both the following sery number and small product number don't adopt the code standard and build up their systems.
不知道对不对.哈