Modernization escalator

An upgraded escalator installed in combination with an original truss of an original escalator, wherein the original truss is provided with a plurality of transverse bar members, the upgraded escalator comprises:

• a truss assembly;
• and
• a plurality of components of the upgraded escalator installed in combination with the truss assembly,
• the truss assembly comprises a lower machine room, a lower turning section, a middle section group, an upper turning section, and an upper machine room;
• the truss assembly has a transverse width less than an inner transverse width of the original truss, and when the truss assembly is embedded into the original truss, the truss assembly avoids the plurality of traverse rod members;
• the middle section group comprises a plurality of middle sections, which are connected to each other in an end-to-end manner;
• and
• each of the plurality of middle sections comprises an upper flattened body, the upper flattened body has a plurality sets of upright bars, the plurality sets of upright bars extend beyond a bottom of the upper flattened body to form a plurality of extension structures, and upper flattened bodies of the plurality of middle sections are connected to each other in an end-to-end manner to form the middle section group.