| A Matter of Customs | |
|---|---|
 Promo poster | |
| 雷霆第一關 | |
| Genre | Action |
| Starring | Liza Wang Danny Lee Wong Hei Jessica Hsuan Raymond Cho Melissa Ng Jade Leung Evergreen Mak Fiona Yuen Benz Hui Felix Lok Joyce Tang |
| Opening theme | "天網" by Eason Chan |
| Ending theme | "戀愛是個海" by Wong He |
| Country of origin | Hong Kong |
| Original language | Cantonese |
| No. of episodes | 32 |
| Production | |
| Producer | Nelson Cheung |
| Running time | 45 minutes (approx.) |
| Original release | |
| Network | TVB |
| Release | September 4 – October 15, 2000 |
| Infobox instructions (only shown in preview) | |
A Matter of Customs (Chinese: 雷霆第一關; Cantonese: Lui Ting Dai Yat Kwan) is a TVB program in Hong Kong starring Liza Wang, Danny Lee, Wong Hei and Jessica Hsuan. The story is about customs officers in Hong Kong.