Chinese shares touched a one-year low, led by a selloff in technology firms after a report that authorities may allow purchases of Nvidia Corp.’s new chips and proposed US sanctions on foreign optical producers. Key points and original sources are listed below.

• Chinese shares touched a one-year low, led by a selloff in technology firms after a report that authorities may allow purchases of Nvidia Corp.’s new chips and proposed US sanctions on foreign optical producers.S1S2