OK 这

zhè this; these; (commonly pr. [zhei4] before a classifier, esp. in Beijing)

三

Sān surname San

sān three; 3

个

gè variant of 個|个[ge4]

gè individual; this; that; size; classifier for people or objects in general

交易

jiāo yì (business) transaction; business deal; CL:筆|笔[bi3]

平台

píng tái platform; terrace; flat-roofed building

购买

gòu mǎi to purchase; to buy

比特币

bǐ tè bì bitcoin (virtual currency)

哪个

nǎ ge which; who

最好

zuì hǎo best; (you) had better (do what we suggest)

？ 官

guān government official; governmental; official; public; organ of the body; CL:個|个[ge4]

Guān surname Guan

网

wǎng net; network

【 薇

wēi Osmunda regalis, a species of fern; Taiwan pr. [wei2]

:373780805】【 微信

Wēi xìn Weixin or WeChat (mobile text and voice messaging service developed by Tencent 騰訊|腾讯[Teng2 xun4])

:373780805】