Do not buy from this company. They sell fakes.
Last November I bought a Xiaomi Redmi 5 from them. My phone OS/software was not updating. They said it was normal. Xiaomi confirmed that the phone had a fake ROM installed. I returned it for that reason (to a given address in Shenzhen, China) but was refused a refund as they denied that the phone was fake and that the phone was 'used.' How could it not be 'used' when I had to test it and found that it was fake?
I reported it to the Consumer Council of Hong Kong. They could not take action as they have no powers to do so. It was already May 2020 and I reported them to the Hong Kong Customs and Excise Department. Up to now (August 2020), they could not provide a solution.
Meantime, I found that this company is only registered in Hong Kong without a business premise. The seller operates from a residential house in Shenzhen.
Conclusion: Hong Kong authorities cannot offer consumer protection. Avoid taking risks by buying from Hong Kong if in doubt.