WeChat is China's most popular mobile social media platform with 889 million active users worldwide by the end of 2016.
In Russia, WeChat is no more.
Its operator, internet giant Tencent, said Saturday it was "deeply sorry" WeChat had been blocked in Russian Federation, adding it was in touch with authorities to resolve the issue.
Internet-based companies which have links in Russian Federation are required to register with the government.
"WeChat did not provide the contact information necessary for registration with authorities", Xinhua news agency quoted Vadim Ampelonsky, spokesman of Russian telecommunication watchdog Roskomnadzor, as saying on Friday.
Currently, some WeChat users in Moscow have been unable to log in or send messages.
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Eman underwent bariatric surgery in March in which doctors reduced her stomach size by two-third, so as to reduce her food intake. Dr Gaffar said: "At present, we have a team of 15 members of multi-disciplinary approach we are providing for the patient".
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However, it sparked criticism after it emerged that traces of animal-derived additives were used in its production . The new £5 notes were introduced in September, but there are an estimated 150m of old fivers still in circulation.
The huge success has helped boost Tencent's market capitalisation to more than US$300 billion, making it the most valuable Chinese company by market capitalization and putting it on par with Apple and Google-parent Alphabet.
According to a recent report from Slate, Russia is trying to imitate China's approach on internet control after the web fanned its largest anti-government protests in five years.
China, which is infamous for blocking foreign social media websites at home on the basis of domestic rules and regulations, has got a taste of its own medicine.
Last year, Russian Federation blocked popular professional networking site LinkedIn as it allegedly failed to comply with the rules.
Social media applications such as Facebook and Twitter are also prohibited in China. The article stipulates sanctions for failure to discharge various responsibilities of organisers of information distribution on the internet.