First, Liu's inscription on the title page of the manuscript is a gift. "Gift" is the act that the donor gives his property to the donee free of charge and the donee accepts it. In this case, I gave the inscription to Liu for free, which met the constitutive requirements of the gift behavior.

Second, Wang does not enjoy the copyright of the manuscript. According to the provisions of the Copyright Law, copyright shall be enjoyed by the author or his heirs and legatees. In this case, Liu only gave Wang the property right of the inscription, but not the copyright.

Third, the prince does not enjoy the copyright of the manuscript. According to the provisions of the Copyright Law, copyright shall be enjoyed by the author or his heirs and legatees. In this case, Liu only gave the property right of the inscription of the prince's father, but not the copyright. The prince only inherited the property right of the inscription.

Fourth, Liu Zi, Liu's successor, enjoys the copyright of the manuscript. According to the provisions of the Copyright Law, copyright shall be enjoyed by the author or his heirs and legatees. The term of protection of the right of authorship, modification and integrity of a work is unlimited.

Fifthly, Liu Zi enjoys the right to use his works by means of copying, distributing, renting, exhibiting, screening, broadcasting, online communication, shooting, adaptation, translation and assembly. These rights originally belonged to Liu. After Liu's death, Liu Zi, as Liu's successor, enjoyed the above rights.

Sixth, Sun's behavior violated Liu Zi's right to publish. The right to publish, also known as the right to publish works, means that the author has the right to decide whether to publish his unpublished works to the public. It is a right in copyright stipulated in the Copyright Law. As Liu's heir, Liu Zi has the right to decide whether to publish the inscription.