A silent chain comprising a plurality of inner link plates and a plurality of outer link plates. Order book data indicative of the resting orders is obtained. Still further, the invention relates to a method of forming the container and a method of packaging articles in the container. Preferably, the automatic re-linking is accomplished using a link editing capability for permanent redirects. 01 to 12 ppm by mass, is used, and by controlling the content of a cyclic carbonyl compound having a carbon atom number of 5 or 6 in the raw material diol to fall in a prescribed range, the color tone of the polyester is improved.