As for Asia, I have heard about the connections between Anglo-Saxon England and certain countries of Asia. There is even proof about it when garnets from as far as Sri Lanka and India were found in the burials of the Sutton Hoo ship dating back to the Anglo-Saxon period here. However, I am not sure of how the garnets even got there. Many people wondering about this generally assume that those garnets, although made in Sri Lanka/India, were passed through several hands on it's way to England.
I have tried to research hard on how the garnets even came to England but then I stumbled across a PDF here which could explain it.
...the journey must have
commenced along the ancient maritime trade
routes of the Indian Ocean, sometimes referred
to as the Maritime Silk Road and continued from there, by ship along either the Red Sea to Coptic Egypt (at that time under the control
of the Byzantine Empire) or via the Persian Gulf to lands controlled by the Sassanid
Empire (it has been suggested that at least some garnets found in Kent may have
passed through Sassanid workshops: Jo Ahmet pers. comm.). Either way, the garnets
most likely passed into the hands of the Byzantine elite, and from there reached the
Merovingian elite, perhaps via riverine travel along the Danube and the Rhine. Kent’s
close relationship with the Merovingians meant that it was in a favoured position to
receive both finished objects bearing garnet-inlays as well as loose garnets (whether
raw or worked) with which to adorn locally produced prestige items.
Though, it doesn't end here:
we should not under-estimate the capacity of individuals to make very long-distance
journeys in the past. The inhabitants of early medieval Europe certainly had heard of India
(and probably also of Sri Lanka, ‘the land of gems’). There was believed to be a Christian
community, centred around a shrine dedicated to St Thomas, in southern India, and the
Frankish sixth century chronicler, Gregory of Tours, was able to describe the shrine since
he knew a monk who claimed to have travelled there. Later, the Anglo-Saxon Chronicle
records that in the year AD 833, King Alfred the Great despatched Sigehelm and Æthelstan
to carry alms first to Rome, but then to the shrines of St Thomas and St Bartholomew in
India, though it is not known whether they succeeded in this journey (see https://www.
caitlingreen.org/2019/04/king-alfred-and-india.html for a discussion of this embassy).
So, we should not completely rule out the possibility that someone may have travelled
all the way from sixth-century Kent to Sri Lanka, or vice versa. And certainly, the latest
(and ongoing) genetic studies have revealed at least one individual with non-European ancestry buried in seventh-century Kent, further demonstrating that long-distance travel was not unknown.
I'm not sure if that person buried in Kent dating back to the Anglo-saxon period is a Sri Lankan who brought these garnets or probably someone else. That's all what It said.
It should be noted that Sri Lanka was even known to the Anglo-Saxons as 'Tabrobanen'. There is proof on this map which could date back to the Anglo-Saxon period, probably 1040 or before. Its called the 'Anglo-Saxon Cotton World Map':
This map depicts Britain in the west (bottom) and Sri Lanka or 'Tabrobanen' in the east (top), in fact Sri Lanka was the most distant land to the Anglo-Saxons at that time.
I still unsure that there could have been people as far as Sri Lanka in the Anglo-Saxon period. Maybe these sources can indicate but I haven't seen anything as far as that.
I'm mainly talking about the Asians here, btw.