No. You cannot use WeChat to recharge Octopus, but you can use WeChat to check the Octopus balance. Octopus is a common electronic payment system in Hong Kong. The chip is built into a credit card, phone card or Octopus card. If you want to top up your Octopus card, you can do so with cash in Hong Kong dollars. Therefore, you cannot use WeChat to recharge Octopus.