As I interpret, Taiwan company only grants an exclusive right to a HK company.
People can still buy the product in Tai Wan without infringing copyright.
HK company has forbidden Tai Wan company from selling to any HK clients direct.
Ching's account is being blocked obviously because of pressure from the HK company. U know, that company has placed an advertisement on BK. If BK does not react in this way, the HK company may threaten to withdraw posting the advertisement in the long run.