The whitepaper does not mention this, but investors from China are not allowed to participate many ICO projects, How about BlockStack token?
From Token FAQ
3) Can overseas investors and users participate in the Blockstack Token offering?
Generally speaking, yes, overseas investors and users, i.e., people outside of the USA, can participate in the upcoming token offering as allowed by applicable law. However, the accredited offering is limited to overseas Accredited Investors and Qualified Purchasers respectively.
Further, any sale to overseas investors must be in compliance with local law, as determined by Blockstack Token LLC and its affiliates.
Generally speaking, overseas users can participate in the voucher registration process described above. Any conversion of the vouchers into tokens will also be subject to compliance with applicable local laws. As a result, Blockstack Token LLC reserves the right to not honor a voucher for any reason, including but not limited to violation of local regulations of the country of residence of a user.