In the respect of polymer construction, novel hybrid structures are anticipated, such as
organometallic d-type CPs [73] and polymers with covalent-organic framework [74]. The
outstanding optoelectronic properties [75] of these hybrid polymers will enable polymer science to
take a further step towards real-world applications. The traditional two-dimensional backbone can
be evolved to three-dimensional skeleton of CPs [76] with the aid of more sophisticated structure
design and advanced synthetic techniques.