According to the guidance of the official documentation, we will turn on the automatic renewal function of Coretime to ensure the long-term and stable operation of Bifrost-kusama. The specific steps are as follows:

Send xcm to the relay chain to open the HRMP channel with the Coretime parachain
Send xcm to the relay chain to transfer 200 DOT to Coretime parachain bifrost sovereign account 5Eg2fntQ2mVKASYGt9C6VMXxED5v7aN7NR7WdwWPv5YrEjkb
Update the xcm version supported by Coretime parachain
Update the xcm version subscription of Coretime parachain
Send xcm to enable the automatic renewal function of coretime

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