       0.000[\*\*\*](#TFN0){ref-type="table-fn"}   *weight = inverse distance*           (0.0000)                                      (0.0000)                                      (0.000)                                       (0.000)                                       (0.0000)                                       (0.000)   Wuhan                                 0.000                                         −0.000                                        0.000                                         0.000[\*](#TFN00){ref-type="table-fn"}        0.000[\*](#TFN00){ref-type="table-fn"}         −0.000[\*](#TFN00){ref-type="table-fn"}   *weight = inverse distance*           (0.0000)                                      (0.000)                                       (0.000)                                       (0.000)                                       (0.0000)                                       (0.000)   Wuhan                                 0.0000[\*\*\*](#TFN0){ref-type="table-fn"}    0.0000[\*\*\*](#TFN0){ref-type="table-fn"}    0.00000[\*\*\*](#TFN0){ref-type="table-fn"}   0.00000                                       0.00000[\*\*\*](#TFN0){ref-type="table-fn"}    0.00000[\*\*\*](#TFN0){ref-type="table-fn"}   *weight = population flow*            (0.000000)                                    (0.000000)                                    (0.00000)                                     (0.00000)                                     (0.000000)                                     (0.000000)   Observations                          0,000                                         0,000                                         0,000                                         0,000                                         0,000                                          0,000   Number of cities                      000                                           000                                           000                                           000                                           000                                            000   Weather controls                      YES                                           YES                                           YES                                           YES                                           YES                                            YES   City FE                               YES                                           YES                                           YES                                           YES                                           YES                                            YES   Date FE                               YES                                           YES                                           YES                                           YES                                           YES                                            YES  The dependent variable is the number of daily new confirmed cases. Lagged average maximum wind speed and precipitation are used as instrumental variables in the IV regressions. Standard errors in parentheses are clustered by provinces.  p\<0.00,  p\<0.00,  p\<0.0.  ######   Within and Between City Transmission of COVID-00