The 'metallurgy' on taiwanese boats leaves very much to be desired.
Much of the 'bronze' is actually red brass. The majority of red metal
castings are outstandlingly porous (gas inclusions). A lot of the
stainless is very poor grade - with lots of vulnerability to fatigue
failure, etc. in stress loaded components.

This is typical to most asian supply metals ----- just like the
imported hardware CRAP that is widescale offered today in the USA . Im
quite sure that if one did a detailed chemical analysis of these
metals, one would find residue of .... cat, floor sweepings, etc.

Many taiwanese boat yards use(d) rigging from 'local' suppliers and
many of the normally forged rigging fittings are actually very
cleverly machined / screwed-together 'contraptions' that are
extremely subject to crevice corrosion failu "Grand Deer" components
as an example.